I will assume you are talking about November 3rd 2011. If so, this makes your estimated conception date February 9th 2011. This date is give or take a few days though. It also depends on when you actually ovulated.
Roughly February 27th
The approximate date of conception was March 4th
November 9 2011
The approximate date of conception was February 18th
November 20th
The estimated date of birth is November 11th
The approximate date of conception was February 27th 2009
Roughly Saturday November 1st 2008
If the due date is August 6 the likely date of conception would be between November 9 to November 17. A full term pregnancy is for 40 weeks.
I would guess sometime in early-ish november....
Roughly Saturday 14th February 2009 (Valentine's day!)
Based on a normal gestation period of 40 weeks the conception date was November 21st 2009.