--about your degenerative disc disease and foraminal stenosis, and whether it might be related to your previous gymnastics history? What do MRI's of the area say?

Given lots of other "normal" tests, you may not have a metabolic, toxic, autoimmune systemic cause to your neuropathy--it might well be compressive/mechanical and stem from problems with the spine. Technically, nerve root compression qualifies as a 'peripheral' neuropathy, but many people with that have problems with spinal compression as well, and since the symptoms of spinal/nerve root problems can exactly mimic those of problems with more peripheral nerves, it would help to know what is going on in your central nervous system as well.