Congratulations!
I did my first test at three weeks and 3 days and it came back as a very faint positive, which got darker as I did tests in later days. When I had my twelve week scan, they moved my due date by four days, which would have meant my test showed positive at two weeks and 6 days. Considering I'd not had intercourse for over a week, I highly doubt the scan dates are correct. I'm still going with my due date next Tuesday, the hospital is working on Friday. At least it gives me another 4 days to be overdue before they talk induction.