it sounds like you might have small fiber neuropathy, due to your symptoms and that it moves around to different areas of your body. if it is, it won't show up on an emg/ncs, so don't get discouraged if that testing proves to be negative , get a skin punch biopsy to test for small fiber neuropathy.

you also may not have one cause for your symptoms. There could be a synergy effect with long term alcohol use, lack of proper nutrition if you werent eating correctly while you were drinking at higher levels, and possible pre diabetes from long term high normal sugar levels.