me and my girlfriend had sex the other day, pre cum came out, she said that she wiped it off of my penis before I inserted it in her vagina. is it possible that there still could have been some sperm in my pre cum when I inserted it in here vagina?I also ejaculated the day before we had sex and I am positive that I wipe away my sperm with water and a paper towel, I also took a shower the next morning, and after we had sex she took a shower, oh and I also did not ejaculate inside her, I put a condom on after I pulled it out the first time. should I be worried about her being pregnant, is it likely that she is with my situation?someone please help.