I am so happy for you, congratulations and hope all goes well. I myself was told last weekend that there is no heartbeat at 7 weeks 2 days, and that I would have a miscarriage. The doctor was able to see "something" and apparently that "something" grew from 4mm to 10mm in size, but since they couldn't see a heartbeat, they said it was bad news.
I wish you all the best. I totally understand what you're going through -- the waiting to find out is the worst. And I'm now waiting for the miscarriage, but haven't had it yet.
Best of all to you and your amazing husband fighting in Iraq!