confused about conception. can someone please help:(

[lls29]

I dont even know where to start. Im trying to figure out when I conceived. This is extremely important because of my situation. Im married. But on April 15 something bad happened and there was sexual intercourse with another man. Im trying to figure out if I conceived in April or may. If I conceived in may then it is my husbands if I conceived in April then it is not. my last period was April 8-13. I do not have regular periods. In may I didnt get a period but didn't think to much about it because of my periods being irregular. But decided to take a preg test just to be safe. it came back Bfn well about 3 or 4 Weeks ago I noticed my boobs were sore and I just didnt feel right and thought mabey I had the flue. My friend said I should take a preg test and so I did, because I had been having sex with my husband since may. Well on June 26 took a preg test and bam BFP I was in shock. The next day I went to planned parenting to have a ultra sound done to see how far along I am and told them the story about what had happened in April they determind I was 7 Weeks and 1 day by doing both a stomach and vag. And said I concieved may 22nd. So that would make it my husbands. But I am scared because they could be wrong. Im horribly depressed. I cannot sleep I can hardly eat. Can some one please give me any help or advise?

[Bean]

Early ultrasounds are pretty dang accurate. I don't think they'd be a month off.

[JJorn]

I agree. If the ultrasound says that you are 7 weeks 1 day pregnant that you are about 7 weeks 1 day pregnant (not necessarily exactly but certainly within a few days).

[hopeful1]

Sounds like you dodged the bullet on that one and it is your husband's. I hope you two can work things out with your situation.