Hello, I have a quick question so I had unprotected sex with a girl december 6, 2015 she found out she was pregnant december 24 , 2015 but she told me she had sex with a guy November 4th, 2015 and had her period November 20, 2015- November 25, 2015. The reason we found out she was pregnant was because she started spotting around the 18th. The Nurse estimated that she was 4 to 5 weeks pregnant. i'm just trying to figure out who's baby it could possibly be. thanks