Could I Be Positive For Pregnancy For Intercourse That Occurred Before My Period?

me and my boyfriend broke up january 29th 2021, i dated my ex was with him for only like 3 days maybe a week, we slept together only like 3 times unprotected, he never came inside of me, i got my period heavy feb 6th 2021 to feb 10th 2021 like heavy as i bled through my pants, keep in mind i have a very irregular period, i then got back with my bf feb 11th and slept with him unprotected since march 9th 2021 i got negative pregnancy test march 2, 3, 4 i got all negative pregnancy tests, then march 9, 10, 11 i got all positive tests, started faint with first one then got darker, how far along am i and is my bf the baby dad i need help.