oh my, I am in the same boat. I had sex on thanksgiving 2008 with an old fling and then my old bf on dec 16, 21, and 26....my last period was dec 6 2008, so my dr. said it was my old bf witha due date of sept 12th, but at my 20 wk u/s the baby measured at sept 8 and my dr said no big deal and at my 25 wk belly check, I was measuring right on 25 wks, so IDK...everyone says I look so big, but this is my 2nd baby

i would estimate your date of conception to be december 11th. add 3 months and 1 week to your estimated due date to get an estimated date of conception (if your cycle is 28 days).

and babyboy.. i think i responded to you a few minutes ago. you dont have anything to worry about either. your baby didnt happen around thanksgiving.