Hi Erin
I have the same prob at the neuros. My most annoying sx seem to disappear until I leave. If I write them down and mention them, they seem to not be bothering me at the doctors. What's with that!
I have the hands fallling asleep too. I had carpel tunnel surgery done on both hands in 1990. Still the same old sx. Mine is definitely MS as my hands are the most affected part of me ... bummer.
I got a memory foam pad, for my bed, for xmas. Crazy as it sounds my hands are better
(a little). I think because it allows them to "float" on top of the mattress and don't sink into it. At least, that is my theory.
Unscientific testing was done when I lent it to my Dad the night he came home after his hip replacement. The following 2 days, I was miserable. And until I got the foam pad back didn't realize what a benefit it was.
These results are not proven by anyone but me. 
I've been through the electicution and needle tests twice, last time in 2007, and nothing showed up. Think carefully before the torture. I hope it resolves itself and you get some relief soon.