Hi MYWILLOW,
I was googling the term "my muscles feel arthritic" (where, incidentally, mine do too), and then found several of your posts which fairly well convinced me that you have neuromyotonia or "Isaacs Syndrome." I suggest that you google "wiki neuromyotonia" or "isaacs syndrome forum," where I can imagine you'll recognize a lot of the symptoms as your own.*
Neuromyotonia is something like one in*a million, and is generally regarded as further out there on the peripheral nerve hyperexcitability spectrum than "simple" BFS, CFS or BCFS. And it's rare such that most neurologists have never seen a case (which hardly excuses any from not taking your complaints seriously IMO).*
I'm just "passing through" and thought this message might help. Will check in again to see if you have questions. Wishing you well.*
David