Late Periods

I'm worried about possibly being pregnant. I did not have sex (I'm a virgin), nor did he ejaculate near my vagina. However, I did give him a blowjob, handjob, he licked my vagina, fingered me and we made out. We started dry humping while I was wearing thin shorts and underwear and he wore boxers. I doubt that I can become pregnant with that, but I feel like there could be a possiblility and it's making me a little bit worried. My period has been late for 13 days, maybe stress is delaying it? All I need is some confirmation so I can relax and not worry about it at all.