Since your testing is not revealing much ....I'd consider that your past RA treatments may have caused your neuropathy.
Plaquenil and other DMARDs like methotrexate, can damage the DNA of cells. Plaquenil is related to the fluoroquinolone antibiotics and as a quinolone has potential to cause nerve damage.
http://www.ncbi.nlm.nih.gov/pubmed/11128688
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Weezie looking at petunias 8.25.2017
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