Date of conception during period?

I am currently pregnant. I as initially told by my doctor that I was due September 27,2007 and my date of conception was around January 4, 2007. He told me this going off of the first day of my last menstrual cycle. I was then told by two different doctors that my actual date of conception was December 26, 2006. I was told this after having ultrasounds. The only problem with that date being my date of conception is that I was on my period during that time. I was on my period from December 22, 2006- December 28, 2006. I did however have intercourse on the 21st of December. The next time i had intercourse was sometime between January 3-5. The reason this is so important to know is because I would like to be more sure to know who the father is because I was seeing two different guys at this time and each date was with one of them. So is it possible that my date of conception could be December 26th?

Date of conception during period?
my due date was sept 16th of last year and the date of conception was dec 24th... so i dont think ur date of conception would add up if ur due sept 27th.. conception sometime in early jan makes more sense.. good luck
Reply:it is pretty rare to conceive the day before your period. BUT if two separate doctors are telling you that you conceived on the 26th its hard to say. If you had sex five days before that and then 8 to 10 days after there is no way to be sure, aside from a DNA test that is going to be the only sure fire way to know. It is unfortunate that the doctors can not exactly pinpoint the date but its true. With conception dates the doctors can only give you an estimate because every woman ovulates at different times. Good luck hope it works out for the best.
Reply:ahahahaha, just call up all the guys you screwed between september and december and roll a dice to pick the father. if it's more than six, then use two dice. if it's more than twelve...well, i have a feeling its probably more than 12 because you sound like a sluuuuut, in which case get a DNA test
Reply:The only way you will ever know for sure is a blood test after the baby is born I think. You seem to know the exact dates of when you did something so I'm not much help here, just making a statement. Sorry