im due aug 30 2009. i think my last period was 18-22. i had sex a few days before my period came down. then i had a fling in the beginnig of dec. i went to the doctor and on jan 23 i was 8wks pregnant. who would be the father? im thinking i was already pregnant by nov 23-27 because i was having preg symptons like sleeping alot. please help!!!