Confused on the father?conception date?

[bethhh21]

i went to the doctors to have my first ultrasound, which they told me i was 9 weeks and 2 days, the babys father then doubted me because it did not match with the weeks i was suppose to be, so i called back and they told me i got pregnant on the 30th of November however, my due date is September 7th 2015, im confused because i did have protected sex with a guy on the 30th, but then had unprotected sexual intercourse on the 15th of dec. (different guy)
so who can possibly be the dad im sure its the one on the 15th but then again everything doesnt make sense ?

NEED HELP.

[bethhh21]

It's really confusing to be honest , im pretty sure it's your bf's  makes sense , o:

[Shaylin222]

I'm going through the same thing my conception date was the day I had protected sex which was the 15 but I had unprotected sex with my bf on the 10. Twice  due date oct 8th