Welcome to NeuroTalk:

I think you should get your actual number for the B12 test and report it here. US testing ranges include a very low number as "normal", so it would not be flagged. Doctors typically don't know this, and many people walk around "normal" who can be helped!

I'd also get a Vitamin D test.

Were you tested for the cryoglobulins and MGUS? If not, I'd get that done too.

http://www.questdiagnostics.com/hcp/...eralNeurop.htm

This is the testing list Dr. Latov uses to diagnose PN.

What testing did you have for diabetes?
Did you have a fasting INSULIN? a long GTT test?

Some impaired glucose tolerance sneaks thru as "normal" with somewhat normal fasting testing. But the long GTT will show dips at 2hrs+ which indicate insulin resistance. Many PNs start at this stage, before full blown diabetes is visible.

Do you know your A1C?

Off topic...I see you like hummingbirds? We have a thread to cams to them on our Pets forum:
http://neurotalk.psychcentral.com/thread135878.html

There is typically some drama at Phoebe's nest. This past week was an example.