My by and I haven't had sex yet but we were dry humping.. he was wearing boxers and I was wearing thin cotton underwear. I was straddling him and he ejaculates. I got off him some seconds later. His boxers got wet but I couldn't tell if he got my underwear wet too because they were already wet from vaginal fluids. Can Sperm swim through underwear and get me pregnat? I know this may sound stupid but I'm a very anxious person and im really worried..It was also 5 days before ovaluation such I know is considered a fertile period..I will appreciate your answer very much.