Am I just worrying??

Hey everyone!! It's been almost three weeks since I had sex for the first time. Mostly it was anal, but we did vaginal too but only for a few minutes. He didn't even cum at all. More so we just made out a lot and did bj and oral. He was resilient cause he's jacked off so much. I doubt he had precum cause he wasn't inside of my vagina for more than 5 mins. However, he jacked off earlier that day and I'm worried he may have had some possible sperm left, however he claimed he peed after which I read supposedly kills sperm and I doubt he had precum cause most of the time we were just doing dirty talk or making out.  I've read so many things and psyched myself out. I never had cramps until last night, but my period is supposed to come this week. I also never had spotting like implementation. Do any of you think there's any possible chance I could be pregnant? I don't have any symptoms of early pregnancy.