All right so I dated this girl for one day and we had sex without protection and lets just say I didn't pull out quick enough, we broke up that day because she's on and off with her ex and is in love with him. 5 weeks later I hear she's pregnant and she says her ex is the baby's dady but I have a gut feeling its mine and she's just saying its her ex so he will stay and be with her. What should I do?