Late period, help! I'm very worried.

Cristina
Help! So a week before I got my period, my boyfriend and I got a little frisky when his parents weren't home, and started rubbing against eachother, we haven't had full sex, but our parts did touch, just nothing went in, it's been 2 months since my last period. I can't be pregnant right? I'm usually irregular, I've just never been THIS irregular.