I Was Giving My Boyfriend A Handjob And His Penis

I was giving my boyfriend a handjob and his penis had Precum while he was rubbing my vagina, however I had an underwear on and he never touched my vagina. We did this 2 days after my last period. Now it's been an entire month and I still haven't gotten my period. I've been very nauseous and stressed. I have a regular cycle and 3 days before my period was initially supposed to start I had brown discharge. Is there a possibility I'm pregnant?