Change of pregnancy, had sex last month with condom and got period, this month no period here?

I had sex but for abot 10 seconds with a condom on, he didn't ejaculate so maybe Precum was in the condom but nothin else. He pulled out after 10 seconds BC I didn't want to do it anymore. I got my period quite late last month but had it for 6 days like normal, I had cramps and it was as heavy as it normally is. This month I've did nothing sexually but my period is 6 days late and I'm really worried. I can't stop thinking about it. I'm 16 so it could be irregular period butim pretty much 28 days on the dot every month apart from this month and the last month. Someone please help really worried.