Hello, I'm new to this website and i need some help and opinion pls. I have a gf and her last period is August 22, we had sex on September 5 and 7, and after that i found out that she had sex with his ex bf on September 8. we count 14 days before using pregnancy test, and the result came almost positive because the second line of pregnancy test is little bit blurred. then she try to use pregnancy test today (september 29) and the first and second line of pregnancy test is really both visible. My question now is who may be the father of the child now? Is it Me or the Ex BF? Thank you for answer/help/opinion in advance. god bless. thank you so much.