I know it sucks. I think 10ish weeks is the norm for most people. Some practices will let you stop by just to use the doppler and check for the heartbeat though. Can you ask your OB if this is something their office does?
My doctor does this. He said to call anytime I felt uneasy about something and they'd bring out the doppler for me. I have wanted to a few times but I don't wanna be "THAT patient" haha. Guess I'll just wait it out til my next appointment the 19th.
As for the waiting advice, try to find something to fill your time and occupy your mind. I know, it totally sucks! my DH is gone a lot for work and I've found that if I'm just sitting around alone, I started worrying more and thinking about it, so I keep myself busy, whether it's cleaning or reading or catching up with a friend. =)