If you do not consume essential fatty acids, your body cannot repair itself.

Here is my EFA thread:
http://neurotalk.psychcentral.com/thread6092.html

Flax oil, and fish oil (or the fish themselves) are necessary for normal skin/nerves. Too much Omega -6 oils like sunflower, safflower, peanut etc, and you become inflamed, and allergic.

The two types must be balanced for health.

Red ears often show up in children with food sensitivities.
If I were you I'd look to something you eat often and also crave.
That can be the culprit. Start a careful elimination of suspects.
This will take time. For example, I found potatoes a trigger for myself! I didn't suspect it for most of my life! I know your doctor thinks that gluten tests are negative, but if you read the gluten board here you'll find people who had negative testing and still improved by going gluten free. The tests do not target everyone consistently.

If you were on alot of antibiotics, one family, called the fluroquinolones is a known causer of PN. (Cipro, Levaquin, Avelox). There is no proven treatment this damage either. Check my thread in the subforum for comments on this drug induced nerve damage.

The B12 needs to be taken on an empty stomach. If you take it with food, it may not be absorbed properly. That dose used daily correctly should raise your B12 levels over 1000 within 6mos, or sooner.

The calcium/magnesium/potassium doses are minute and not likely to help with anything.