Help please!! thank you!!!?

please i need your help, please try not to be rude..the first day of my lmp was 10/31/08. I have a 28 day cycle.my due date is 08/07/09. i am 28 weeks and 1 day pregnant today..in sonogram im always measuring a week ahead, i dont know why..Anyways, i had unprotected with guy1 on Nov 11 and 12. On Nov 23 i had with condom guy2..Who can be my baby's father?