My bf broke up with me beginning of July. I had sex with a friend July 18-23 then had sex with my bf July 26-30 and all of August. I got my period august 10th from what I remember it was normal. I found out sept 3rd I was pregnant. This was confirmed a month later at my 8 week ultrasound which showed baby measuring 5 days sooner which changed my due date from may 17 to may 12th. Who is most likely the fatdates thanks for the advice and help