Help😣

Can I be fertile 5 days after my period? I preformed oral sex on my bf 5 days after my period and he came. he dried up and then we took a nap for like an hour. we woke up and started grinding on each other 😂 idk if he precummed during this or not but his tip was on my folds and it kept brushing it. I'm 18 and still a virgin and I really need some help. do you think it's possible for me to get pregnant?