My bf and I borke up on June 9th (we had been having sex regularly until this point) and I had sex with another man on June 14. On July 11th the ultrasound said I was 5 weeks and 6 days along. Would that mean that my ex bf is the father or the other man? I also thought I was pregnant before my last period came because it was a little late but I took a preg test and it came back neg so I didn't worry about it. My last period was at the begining of june and I would tend to say that it was irregularly light and short ( 5 days). I had the first day of my period around June 1st. Can someone please help me?