Period suppose to come on 28 jan but didn't.late for 19 days.no pregnancy symptoms. negative test for 3 ovulation test suppose to buy pregnant test.preg?

A little confusing: If i understand correctly, you have taken 3 ovulation prediction tests ; all were negative. While the home tests for ovulation and pregnancy can show some overlap, it would be ok to check a home preg. Test. If negative, then something else causing the late period. If you didn't ovulate then period won't start on time. Probably safe to wait another month or so, to see if the periods return.