I had unprotected sex on 25th May with an ex following a breakup with my partner. I had actually started my period on 24th May so was on day 2 during the time of intercourse. I then got back together with my partner and I believe we had unprotected sex on or around 5th June, (can't remember the exact date). I took a pregnancy test on 3rd July which confirmed I was more than 3 weeks pregnant. I already have a child with my current partner and he is excited about my pregnancy. I was confident that it's his baby but after reading that you can get pregnant during a period, now I'm not so sure. I haven't had any bleeding since my period in May which I believe lasted about 5 days. The hospital confirmed at my dating scan yesterday that I am 12 weeks + 6 days today and my due date is 26th Feb. Please can someone tell me who the father is.... I'm going out of my mind with worry, and strongly regret what I did. I'm worried that the dates from the scan are wrong or something and it is actually my ex's baby. I've not come on here for people to judge so please on comment if you are trying to help. Thanks.