Help Please! pregnant without intercourse?

i recently had been fooling around with my girlfriend. the story is i had ejaculated earliar in the day we had fooled around, i washed my area off well with soap and water, also i used the bathroom to try and clear it all out, about an hour and 1/2 to 2 hours later we started fooling around, we both had all of our clothes off but no penetration, just grinding,i never came close to having an orgasm cuz i knew about pre cum can come out before. i dont think i any pre cum left but is there still a chance when i am not feeling anything? or is there a chance that there was still sperm left in my penis from ejaculating earliar even though i washed with soap and urinated after? my girlfriend and i are worried because she is about 2 weeks late. she had a bunch of basketball games before she was supposed to have her period. about 12 in 3 days, and when she got back from her games we were in an argument that could have gotten her stressed, could these be the main factors in her late period? what are the chances of her getting pregnant with what we did? should i get a pregnancy test soon? by the way the day we were fooling around was also about 2 days before her normal period, i she more fertile then? and we dont know the exact date of her period we just have an idea becuase she has been about 2 days after her mom and it has been 2 weeks after her mom had her period.