--you should be tested for vitamin/mineral levels, given that you have documented digestive system problems; deficiencies in a number of nutrients, from the B-vitamins to electrolytes can produce neural symptoms. I agree that B12 level is low given the amount of meat you eat--it strongly suggests malabsorption.

Have you ever been tested for celiac/gluten sensitivity in the past (before eliminating gluten from your diet)?

And, what other testing have you had that you can specifically report on--any nerve studies, toxicity tests?