I couldn't really understand what you were trying to say. You will be 33 weeks pregnant on Monday May 4? If that is the case, ulatrasounds done after the first trimester (12 weeks) aren't as reliable as the ones done earlier and could be off by as much as two weeks. However, since you had a normal period after having sex with the other man, I don't understand why you would think you could be pregnant by him and not your partner.
Counting back 33 weeks from May 4, I got a conception date of September 15 which doesn't cleary indicate either man. Sorry I couldn't give you a more definite answer.

I have seen alot of questions like this one and my answer is always the same im affraid.We can try to help by calculating some dates but we can only tell you what you have allready worked out.The only way to put your mind at rest on this issue is to do a dna test and i also feel i must tell you that with my current pregnancy i had what i thought was a normal period for 3 days but i was acctually allready pregnant i am tottally sure of this as early scan dates tell me this is true.Good luck and you will feel much better when your clear in your mind who the father is im sorry for your situation and hope you get the outcome you want

well yea, there is a chance you could be pregnant by the other man, its one of the concenquences of cheating on your partner... as for is it or not, you wont know until the baby comes and who he looks like, or you can even do a dna test from walgreens!

the last time you were having sex with another man, you were fertil and the last time with your husband, you were also fertil, although you got your menstruation period on time after having sex with the first but you are still confused, try to remember if your areolas and portion of it changed to dark 1 week after sexual intercourse with the first if not then i am sure your husband is really the father ..

if i had to GUESS i would say it's your husbands b/c you had a period after you had sex with the other guy.
the same thing happened to me 14 years ago. i got out of a relationship and into another with the same situation.
there was a three week gab, eventhough i had an ultrasound done, and the doctor reassumed me. i was scared b/c i was so much in love with my son's father at that time i didnt want any confusion or hurt.
now that i see what he has to offer, i wish my son was the from the other dude.