Need Help

I slept with 2 guys, 5 weeks apart.  Could an ultrasound given at 20 weeks be off by 5 weeks?  I only slept with the first guy once then got back together with my ex and the ultrasound puts me conceiving 5 weeks after the first guy.  Should I be concerned that it may be off by weeks and that it could be the first guys?  My estimate due date is March 20th of 08 and I slept with the first guy on May 3rd.  My conceive date with the estimated due date would be June 7th.  

[Kim1989]

your last two sentences throw me off but you say "My estimate due date is March 20th of 08 and I slept with the first guy on May 3rd." with that information your date of Conception Occurred around June 28, 2007. so with all that, and you saying you slept with the first guy on may 3rd.. the babys not the first guys

[spade22]

A DNA test is the only way to find out who is the father.

[Waiting4myprincess]

I think you are going to have to get a DNA test. Good luck.

[sally15]

When was ur last Period?

[Van73]

Huh......Well I think the Maury show has a special goin on....just a thought?

[victoria83]

Van: you made me laugh
ramokh:BUT really i would get the dna test done. you could never tell if you ovulated late or early.that has a lot to the time you got preg.  good luck

[dbestone]

seems like its not the first guys. with a edd of march 20th, you had to conceive in june sometime.

[JoyRenee]

The most an ultrasound would be off is about 2 weeks.

But, as the other ladies said, definitely get a DNA test just to make sure!!!