Well, you could do worse than to look at the Peripheral Neuropathy forum here:

http://neurotalk.psychcentral.com/fo...aysprune=&f=20

Lots of info, especially in the Useful Websites "stickies" at the top of that page, and lots of sympathetic people.

Dysautonomia is not uncommon with small-fiber neuropathy, as the small, unmyelinated fibers, in addition to subsuming the sensations of pain and temperature, are also the controllers of a number of autonomic functions--blood pressure, sweat response, digestive motility.

I find it interesting that you report sleep apnea as well, as I'm getting a picture of someone who might have a few pounds to lose, might have impaired glucose tolerance, etc.--can you enlighten us as to your situation, characteristics, syndrome progression, diagnostic journey, and the like? The more info, the more useful responses you'll probably get. (You can do that on the neuropathy board, rather than here, if you like, or in both places.)