Hi, dancer, did you get the "7 weeks pregnant" figure from an ultrasound? If not, how did you get it? (I get 6 weeks 1 day pregnant as of today, April 29, if counted from the first day of your last period.) Anyway, in your shoes, if you have not yet had an ultrasound, the best way to sort this out is to get an ultrasound this week or next week. There is a relatively short time where you could use it to try to tell (by the size of the embryo and its developmental markers) when you conceived, and the sixth and seventh weeks are pretty much the best time to do this. Ask them for an estimated due date based only on the embryo's size and not on when your first day of your last period was, and then take the estimated due date home and plug it into a conception calculator or just count back 266 days on a calendar. That will give you an estimated conception date.