While he was cuming, he put his genitals into my vulva

Hi There

Im Julie and im 21 years old. Me and my bf we were talking about how lucky our families will be if we had a baby, my bf seemed really confused and freaked out. He looked worried so i stopped talking about it. After awhile he started playing with himself and as he was cumming he put his penis in my vagina. he at some point i think wanted this cause he without thinking just put it inside me. i feel really excited. But the question lies am i likely to be prego?