What was going on when I was born?

The official Soviet press agency warned today that the Polish Communist Party was being threatened from within by ''revisionism'' - one of the gravest ideological heresies in the eyes of the Soviet leadership. It was the first time since the labor and social crisis erupted in Poland nine months ago that the Soviet press had raised such a grave charge - one that has historically been leveled by the Kremlin against its major adversaries in the Communist movement. It was used in 1968 before the Soviet-bloc's invasion of Czechoslovakia. In Warsaw, the Government and the Solidarity trade union movement began talks on a variety of persisting issues. The talks, conducted on national and local levels, were the first since last fall not to be overshadowed by strikes threats. (Page 14.)

For 12 years, Protestant and Roman Catholic militants have tried to determine the fate of Northern Ireland by killing each other. Bobby Sands is trying by killing himself. Mr. Sands, ''camp commander'' of Irish Republican Army inmates at Maze Prison outside Belfast, has now refused all food for 56 days, three days longer than seven prisoners who gave up an earlier fast in December. up an earlier fast in December. His sight and hearing failing, he was given the last rites eight days ago.

YEAR-OLD Laverne Joseph had been out of school for four years when she showed up one day recently at a New York City public schools ''outreach center'' for dropouts. In as nonthreatening a tone as he could muster, Edward Phelps, an intake counselor, asked her quietly, ''What went wrong?'' The youth responded with a story that has become increasingly familiar to school officials. She had had trouble with a teacher who ''blamed me for things I didn't do,'' so she began casually cutting her classes at Adlai E. Stevenson High School. Soon she was hanging around with friends who were also on the verge of dropping out, which led to a string of low-paying and unrewarding jobs, as a nurse's aide and a locker-room attendant at Orchard Beach, and, finally, a decision to try for a high-school-equivalency diploma. ''When I didn't work I would look at soap operas, but that got boring,'' she explained.

The Administration's first 100 days expire this week, and the period has attracted punditry. Actually, the next three weeks or so are taking shape as make or break for the Reagan economic program.

The measure under consideration was a bill declaring that human life begins at conception, thus making abortion equivalent to murder and criminally punishable. The sessions, held in a packed Senate hearing room over two days last week, were as highly charged as the issue itself. All five witnesses called by a Senate Judiciary subcommittee on the first day testified that life begins at conception. Prof. Hymie Gordon, chairman of the Department of Medical Genetics at the Mayo Clinic in Rochester, Minn., said this was ''an established fact.'' Dr. Jerome Lejeune, professor of fundamental genetics at the University of Rene Descartes in Paris, compared the fertilized egg to Tom Thumb or an astronaut. Dr. Micheline Matthews-Roth said ''It is scientifically correct to say that an individual human life begins at conception, when egg and sperm join to form the zygote, and that this developing human always is a member of our species in all stages of life.''

Warsaw Pact military maneuvers may be over in Poland, but there was heavy shelling in the ideological war games last week. The casualties, which could be heavy, won't be known until the Polish Communist Party Central Committee meets in plenary session this week. Before the meeting, the Kremlin dispatched Mikhail A. Suslov, its big-gun protector of Marxist-Leninist purity. His brief visit was billed as ''friendly,'' but there were only handshakes, not the usual comradely embraces, when Stanislaw Kania, the Polish party chief, greeted him at Warsaw airport. Their official communique omitted previous Soviet expressions of confidence in the Polish party and said the conversations were ''cordial'' -a Communist euphemism for blunt.

BABYLON THE wind was blowing from the southeast across Captree State Park in gusts that reached 30 knots. It was such a miserable morning that large herring gulls and terns that ordinarily would be airborne, prospecting for fish in the nearby ocean and bay, were grounded in the parking lots, their heads turned away from the winds. ''When I got to my boat this morning,'' said Capt. Ron Peters of the 68-foot Yankee III, ''I found two pairs of mallard ducks paddling slowly along the leeward side protecting themselves from the wind. I've seen real raw, wet days, but this one I'll really remember. I even think I heard one of those ducks sneeze.''

YORKTOWN HEIGHTS INTEREST in public high school lacrosse, born quietly in this northwestern Westchester community in 1966, continues to grow in a surprising manner. Whereas there was only one varsity team in the county then, there are now about 25 interscholastic rivals. ''The continually increasing enthusiasm over the sport keeps amazing me,'' said Jerry Walsh, coach at Yorktown Heights High School, which this year is defending its Division I championship. ''I was a player in that first team here 15 years ago,'' Mr. Walsh said. ''To get games then, we had to go outside the county to find rivals. The only Westchester unit was one at Peekskill Military Academy, a school that no longer exists.''

SALISBURY A RESIDENT'S demand that Salisbury officials place certain facilities at The Hotchkiss School on the town tax rolls has raised a legal question that may have implications for other tax-exempt schools in the state. ''A wrong to be righted'' is how James D. Johnson, a Salisbury artist and the owner of a small indoor tennis and squash facility, views the current tax-exempt status of the 90-year-old Hotchkiss School, one of the town's largest property owners. Mr. Johnson told the Salisbury Board of Selectmen in February that it had violated state law by permitting the school to claim exemption from taxation when it was leasing part of its 480-acre campus in the Taconic Hills of northwest Connecticut to All American Sports of New York City for use a summer tennis camp. In response, the Selectmen retained Ralph G. Elliot, a Hartford lawyer and one of the state's recognized experts in municipal law, to examine the school's tax-exempt status. Mr. Elliot's opinion, delivered to the Selectmen earlier this month, was that the tennis camp was a commercial venture and that the facilities leased by All American Sports should not be exempt from taxation.

WHEN the state finished financing the Connecticut Turnpike, it set a passenger-car toll of 25 cents and figured that it would take until 1997 to pay for the road. That was in 1958, and since then, the turnpike has seen drastic increases in operating costs, a prolonged gas crisis that has cut traffic, and now, an increase in the tolls, all of which may cause motorists at the eight toll plazas to wonder when the road will finally be paid for. In fact, enough money has probably already been collected to retire the $459.5 million in bonds. But it has not all been used for this purpose; over the last 14 years, $97 million in toll revenues have been used for general state expenditures.

Georgetown won the 3,200-meter relay and Villanova the 6,000-meter relay today in mild upsets made possible by last-lap heroics. Seton Hall ran away with the 1,600-meter relay and came within a foot of winning the 800-meter relay, too. Those and three relay victories by Tennessee were the highlights of the final day of the 87th Penn Relays, America's oldest and biggest track and field carnival. Those races warmed the 26,787 spectators at Franklin Field, and they needed warming because most of the races were run in temperatures that never climbed above 49 degrees and in winds seldom less than 25 miles an hour.

OSSINING THE Maryknoll Sisters buried one of their oldest missionaries recently on a hill above the Hudson River. They sang ''Gloria'' to guitar strains as they walked from the chapel onto a lawn bright with sunshine and magnolia blossoms. Only the small white coffin showed that this was a funeral procession. ''It's a very cheerful one,'' said Sister Martha Bourne. ''Sister Eunice was 91. She was ready.''