when did i conceived??? Please Help

Hi, I know there are a lot of questions like mine but I really need some help...ok the first day of lmp was 02/02/2009 lasted until 02/10/2009, I slept with my ex on 02/07/2009 (was on my mp) we did it once that night then I had sex with a friend on 02/21/2009-02/22/2009 (over night) 4 times. I went to my ob for an US on 04/20/2009 and it said that I was 9w 4d and that my due date is 11/19/2009, now im confused because dates dont match I didnt have sex anymore only on those 2 days,, please HELP!!!!! when did I conceived????

[Kim1989]

Thursday, February 26, 2009

[Kim1989]

even though going by your due date you lmp should have been feb 12th. so it doesnt look like you have a 28 day cycle.

if your having trouble finding out who your childs father is then you would need a dna test.