was your last af around nove 22, bcuz if im not mistaken, using nagels rule, thats about when your lmp was., so you had to be fertile from CD14 to about CD18 which would be dec6-10, this is going on if you have a 28 cycle day.
pregnant*
you conceieved...at or around Saturday, December 6, 2008. that means you had sex somewhere around that date.
you had intercourse with your ex on november 17? thats not near december 6th...hes not the father.