Am I pregnant?

I was supposed to get my period on Sunday and was experiencing sharp cramps the night before and they were the ones that I usually get with my period too so I wasn’t worried. Sunday morning my boyfriend and I had sex and honestly I was scared he would get blood on his dick since we’ve never had period sex. Now I’m two days late and im not feeling those cramps anymore. Can penetration delay or put your period to a stop??

UPDATE: I got my period in class a student yelled and woke me up from my nap I got scared I thought I peed but it was blood lol.