I'm 18 years old and I've been dating this guy for almost 6 months and I lost my virginity to him Friday night. Since then we've done it 3 other times and all of those times we didn't use a condom but he pulled out and I am on birth control pills but I don't take them at the same time everyday and I skipped one this week but caught up by taking 2 in one day. Should I be worried about pregnancy because of precum or anything?