Had sex 3 times on my fertile day nd a day after my ouvaltion date. Bf nutted in me all the times thtday nd also had sex next day. Chances of pregnany?

Possibly 25% Chance of pregnancy is about 25% in any cycle if you have sex near ovulation (and you and boyfriend are normal). Having sex the day before or the day of ovulation is best. More sex than that doesn't increase chance of pregnancy.