my boyfriend and i messed around in the end of may and beginning of june.. he had on compression shorts which are thicker than under wear and i was nude, he grinded up on me two times but it was more towards my stomach not the opening of my vagina. he hadn't came in three days and he peed plenty of times before this happened, i mention that because they dont come from the same place, as in precum and sperm so urine washed whatever was in the urethra out. and im still kinda worried about pregancy and precum .. help.