While sex in the car?!!!!!!!!!!!

My boyfriend and I were having sex in his car you know a little doggy quickie ;) lol we were done and all but his dick was still inside me anyways there was a car coming so we like got down and we were laughing I literally "peed" and it like took his dick out of me!!! But the thing is I DIDNT need to pee like I didn't even feel like peeing before we even had sex! I just don't know wtf is going on I'm 19 never had an orgasm! So idk help!!!! And the funny thing is 4/20 is our anniversary and it happened on our anniversary IN his drivers seat!!!! Lmao ugh we couldn't stop laughing!!!! Please help!!!!! Lol thanks in advance!!!!