If you put in your LMP in a conception calculator, it says your dude date would be November 13th. This is using February 6th as the first day of your last
menstrual cycle. This is what it gave me:
First Day of Last Menstrual Period: February 6, 2011
Probable Date of Ovulation: February 20, 2011
Possible Dates of Conception: February 16 to February 24, 2011
Due Date: November 13, 2011 (40 weeks)
When exactly are you due?