Hi, I was with my partner for 3 year I cheated on him on 12feb2013 and went with someone else on the 15feb2013 or it was 16feb2013 I am now pregnant and need to know who the father is. I really want the father to be my partners of 3 year as I have told him he's the dad because my friends done the dates and they said it was my partners of 3 year I do not remember when my last peroid was. I am due on 12nov2013 I am 18 weeks pregnant and 3 days could you help me please thank you

NOBODY can guess its way too close... you have to have a DNA test done after the baby is born.

You decided to cheat... at least be adult enough to tell all involved parties they might be the father... and do it now. The baby as well as they have the right to know who the real father ends up being. Because before child support is ordered a DNA test will be done to prove they have the right person... and the baby needs to know for reasons of family medical history.

There's a three or four day difference between your partner and the guy you cheated with? Did I read that right?

If that's the case, there's no way to determine who the father is at this point, even with an ultrasound (ultrasound is not exact, and can be off up to 2 weeks either way). Your only choice is to wait for the baby to be born, then do a DNA test to determine paternity. There is not other way to figure out who the daddy is.

The best estimate even at the doctor with testing, for conception dates will a two week window of time, so there is no way to even guess on this one. You will have to do a DNA test after baby is born