Have you gotten a second opinion?...the reason I ask is because I was diagnosed with it last December, but what made me suspicious is that the doctor didn't give me options he went straight to the machine, not only that, but I'm pretty skinny, and that is more common in people not as skinny as me( I'm 100 pounds), anyways, I read on several forums that you have options, when asked the doctor about those options he gave me the run around, so I went for a second opinion and what the otherndoctor told me I had was restless leg syndrome...not that is a good thing to have, but I don't have to sleep with one of those machines that I tried out a couple of nights while I was in the sleep lab.
Good luck on what you decide to do.