tmi..but i need help!

on sunday , it’s friday now for me , i had short sex with my boyfriend in the pool. some people might think it’s weird but it was my first time doing that and not my favorite. anyway , we didn’t have a condom obviously. but it was very short and he did not finish. however , he had finished previously that day. i was supposed to get my period on monday and i still haven’t. could i be pregnant ? somebody please help !! also , tmi but we struggled to get him inside of me since we were in the pool so i feel like any precum would’ve been wiped off. i’m still really scared.

and please don’t tell me not to have sex unless i’m educated, because i am. but stuff happens.

UPDATE- i just got it. thank you everyone !!!