I found out my gf had sex with a guy on the 15th of june she then had a Period on the 17th which lasted till the 22nd me and her then got together on the 22nd and had sex on alot of acasions after this. She did a pregnancy test and found out she was pregnant I didn't know about the guy she hooked up with before we got together till 3 days before the ultrasound 12 week. We went there and we were told she was 12 weeks and 2 days pregnant she slept with the other guy 12 weeks and 6 days before this and me 11 weeks and 6 days. I think it's his child and have distanced myself from this but it's eating me up as I really want it to be mine can anyone help?