My fiancé ejaculated on my vagina then stuck it in

My fiancé ejaculated on my vagina then stuck it in without cleaning it. Do you think there is a chance I can get pregnant like that? I'm scared!! It was a lot and he just put it back in with no care in the world. I know this is TMI I'm sorry! He wants to start a family but I'm still unsure :/ only because I'm not done with school. Yet he's the one who's done and with a great job, I just want to be done with my goals in life before I conceive. Has this happened to anyone? I'm not sure if he was still ejaculating afterwards when he put it in me but it was a lot.