period

hi guys, so me and this guy about a month ago started doing stuff at this party and i’m about 99% sure we didn’t have sex but i was drunk at the time, he’s never done anything like this with another girl and he tells me we didn’t have sex, but we done other stuff, moral of the story, my period is 3 days late but my exams are coming up so i’m pretty stressed about that.

he didn’t finish either but can anyone kind of ease my mind and if anyone else has had the same experience, talk me through what happened ?? thank you x