-though I'd recommend they extend it a few more hours, with measurement, concurrently, of your insulin levels as well as glucose. This is because it is now well-documented that impaired glucose metabolism can result in neuropathy, especially of the smaller fibers that subsume the sensations of pain and temeprature, well before frank diabetes would be diagnosed.

There've been a number of recent posts that list a number of papers and overview on that subject:

http://neurotalk.psychcentral.com/sh...603#post150603

http://neurotalk.psychcentral.com/sh...ad.php?t=27026

Moreover, you sound like could very possibly have a small-fiber neuropathy--and these are often very hard to discover with "standard" testing, but the symptoms--sensory and/or autonomic--can be severe.

Take a look at:

http://www.thecni.org/reviews/13-2-p07-treihaft.htm

http://www.enabling.org/ia/celiac/do...%20article.pdf

http://www.neuro.wustl.edu/neuromusc...ory-small.html