--a comprehensive neuropathy work-up from either a tertiary research center that is familiar with the many types and presentations or a specialist practitioner who's willing to investigate.

Many of us consult the Liza Jane spreadsheets, which were designed to be as comprehensive a database of possible tests for neurological symptoms as current medical science could conceive; you shuold look it over and see just what kinds of testing you've so far had:

www.lizajane.org