Thanks Wide-O, super helpful. Will definitely take your advice.

Think you are right on the neuro guessing a bit, I pushed him pretty hard on everything. After the EMG was normal, pushed him on the SFN and skin biopsy. In his opinion, because this didn't really start and worsen in my feet/toes, the labs were fine, EMG was fine and the physical exam was fine, he felt like there isn't much more to do.

He just told me to come back in 6 months to a year if things don't get better or get worse! In the meantime I may see if my regular doctor can test me for any vitamin deficiencies (other than B12) and/or alergies.