All I can say is hang in there. I am playing a waiting game as well. My lmp was on 9/7. My numbers started at 93 on 10/10 and by 10/18 had risen appropriately to 1287. On 10/31 they were only 5,000. They had not risen as much as expected. I had an u/s on 10/23 and saw a sac and yolk sac and by my second u/s on 10/31 nothing had changed. The doc is expecting a miscarriage. I have decided to wait for things to happen naturally as I couldn't live with myself if the doctors were wrong and there was a baby in there!
I will try to wait patiently and if no m/c happens by the week of Thanksgiving I think I will ask for another u/s and hcg levels.
I know how hard this is. Just hang in there and trust your instincts. I've noticed on this site that it's not uncommon for docs to be black and white when pregnancy is full of shades of grey. It's my first pregnancy, so I'm clueless about what's normal, which makes it even more difficult I think. Good Luck!