Period on 16/01/ -20/01/had an accident on the 22nd jan , took morning after pill on 24th jan. not had period yet & 3 neg test, could i be preg?

Likely, no: If your last unprotected intercourse was january 22nd and you took morning after pill on january 24, and you've had 3 negative pregnancy tests and it's now february 24th, the likelihood that you're pregnant is very very low. Consider taking another test in 5 days, but my guess is that it would be negative as well. If don't want to be pregnant, consider reliable birth control? Good luck!