If i was 6 weeks n 3 days on april 9 when did i conceive ; i have a 35 day cycle and my due date is nov 30 2014 my last period was feb 15-19?

Estimate by Dates: By using a Birth Date Calculator, your estimated date of conception was between March 10th - 17th. This takes into account your likely day of ovulation being 10/Mar/14, with conception following within 24 hours. Estimated gestation by date is not an exact measurement - an Ultrasound later in the Pregnancy may help confirm your dates. Delivery +/- 2 weeks of your due date is Normal.

Guess at best: Based on calculations, you may have conceived somewhere between March 3 - March 8, 2014. Obviously this is subject to a great degree of variation and a number of factors.