First let me start by saying I have very irregular periods...I usally have onle every other month..Anyway..I had a period in May 2007 I didn't have one in June but in July me and my then boyfriend had sex on July 14th and on July 17th I started my period it was a normal 5 or 6 day period..we broke up on July 18th (found out he was cheating) I got asked out the day after we broke up and I am still with the guy. we started having sex the day after my period ended..On Sept 2nd I found out I was pregnant and on Sept 14th the doc did an ultrasound and said based on the fist day of my last period I was 8 weeks 3 days...( but my periods arnt normal)so my due date is april 22nd I am now 27 weeks and about to get married to my boyfriend but its really stressing me out that maybe there is a 1% chance the baby could be the first boyfriends... by the way..the doctor said it was not the first boyfriends...he said I prob got preggo between July 30-Aug 4..and me and my now boyfriend did have sex in that date range..Could it be..thanks for all your help!!