Pregnancy?

So tonight I went over my boyfriends house and I tossed him off and he came, about two hours later after being downstairs we came back up and we had unprotected sex. I’ve been taking the combined birth control pill since Thursday (meaning that I’ve taken 5 pills now), he didn’t cum again during this but I’m just weary of the cum before when I tossed him off as he didn’t get a shower? Could I be pregnant?