should I be worried???

me and my boyfriend had anal (not our first time doing it) and neither of us were sure where he had climaxed on me. I wasn't really worried about it before but now that my period is late im kinda anxious about it.

I know this doesn't mean anything either but 2 of my friends had a dream about me being pregnant on the same night.

Idk theres just a lot adding to my worries right now and I'm not quite sure what to do