Hello. Approximately 13 Days Ago, I Engaged In Dry Sex

Hello. Approximately 13 days ago, I engaged in dry sex (dry humping). My partner wore boxers and sweatpants, while I wore jeans and panties. There was no skin to skin contact aside from kissing. We were outside (pardon the odd scenario) in a secluded area, where it was likely below freezing. My partner indicated that he was able to feel a wetness above the area (from the outside of his pants) where he had ejaculated twice. I had finished my menstruation cycle a few days prior (about 5-7 days). I was sitting on top of him, and he was sitting upright when I was grinding on him. I am now freaking out about the chance that I could be pregnant?! The only real symptoms is discharge (it could be due to ovulation) and firmer breasts. Please help.