My due date is August 29, 2012 and my LMP was November 22, 2011. My first due date was August 28, 2012, but I think my OB GYN added the extra day because of the leap year this year. I'm 12 weeks pregnant, 13 weeks this coming Tuesday. My boyfriend and I broke up back in December and I had sex with another guy on December 16. We used a condom and he pulled out. My boyfriend and I got back together then discovered I was pregnant. We are so excited, but I just feel so guilty. I cannot fully enjoy my pregnancy because I'm worried that there is a chance of this baby not being his. My boyfriend and I had sex very early in December and we did not use a condom and he finished in me. So is this my boyfriends baby?