HELP ME PLEASE 🚨🚨IM SO SCARED!!!! please comment

So I gave this boy head just over 12 weeks ago. I wiped my mouth with my sleeve after he came. I went to the loo at leat 30 minutes later. I was just wondering if when I went to the loo some of the stuff from my sleeve would have touched my vagina and I could be pregnant. Obviously there wasn't much on my sleeve. Would all the sperm be dead by then? What there even been any on my sleeve? Can sperm travel around on your body e.g. Your hand? Am I pregnant 
Ps. I've had my period 3 times since. It they have been reallt weird, not my usual heavy long periods