Am I possibly Preggo? Probs TMI I’m sorry I’m advance

So I’m not one who wants to have sex rn but last night Things got a little frisky and my bf started to put in in but it was to tight but he left it there for about thirty seconds and there was a lot of rubbing w out underwear on. He didn’t finish on me but I read that the pre ejaculation can impregnate you... Thoughts???