I am today 7 weeks pregnant, when was the baby conceived?

Simple way to figure: If you mean you are due in 33 wks, you can make a simple maneuver with a calendar & come up with the date. Take your due date, go back one year and add 12 weeks. That becomes the likely conception point. Early projection of the due date is sometimes off by a few weeks, so it may be changed as you get further along & they do an ultrasound.That may give a different starting point.