I'm worried about my period being late.

I have not had sex before. However, my boyfriend and I did dry hump, I gave him a BJ, we made out, he licked down there, etc. (I apologize if there is too much detail, I just want to give as much information as possible so I can get accurate answers.) I doubt that I'm pregnant, it's nearly impossible to get pregnant from things like that. However, my period has been about 16 days late. Stress could probably be the main reason why it's delayed, but I'm starting to worry a bit about pregnancy. Once again, I know it's nearly impossible to get pregnant, but 16 days late seems to be a bit worrysome. Is that normal?