If your last period started on april 13 you probably conceived approx. April 27 to to april 30, if your periods are 28 to 30 days apart and regular. Your due date should be jan 18 to jan 21. You were probably already about a week pregnant by may 8. It really depends on the length of your cycle. Only a dna test can determine parentage 100%.

With a 28 day cycle this would have been your most feritle time to concieve monday, april 24, 2006 to saturday, april 29, 2006. Even if you have a slightly longer cycle it still wouldnt be the guy you cheated with.

It would be hard to tell. Keithann and emma2 offered some good information, but it's all on the basis that you ovulate two weeks after the start of your period, which is a typical cycle. However, there's no way to tell if that's when you ovulated, or if you ovulated more than once, which is also normal. The only way you'll know for sure is if you have a paternity test done, because no one here can tell you for sure whether or not the child you're carrying is really your boyfriend's.

Cambion if she has a regular 28 day cycle she would have without doubt ovulate within the dates I provided. The exact day is of course impossible to know but obviously she did ovulate at some point now the real question is does she have a perfect 28 day cycle?

My cycle is usually 27-28 days apart so I am pretty sure that it is my boyfriends but I just wanted a second opinion. And I really don't want to tell him because it will break his heart... And I should have never done it in the first place!

It really sucks when this kind of thing happens, but I hope you have learned your lesson and won't cheat on him again. Personally, if I were in your situation....Are the 2 guys friends? I would ask the guy you cheated with to take a dna test. If the 2 guys aren't friends then you shouldn't have to worry about your boyfriend finding out the truth. If you find out the answer to the dna test from the random guy and he isn't the dad...Then you will feel a lot better, and you'll spare your boyfriend the details.