MT - i had a scan at 7 weeks (on tummby) at my ob's, but he couldn't see anything - so he decided to do an internal scan. It is alot clearer and I could see the flutter of the heartbeat. What type of scan did you have? If still concerned ask to have an internal scan. It doesn't hurt but it does give you a very very clear picture. Good luck, I hope you see the heartbeat.