Hello!
I hope you will see this, even though your post was 12 years ago. We have very similar symptoms, etc. I was MISdiagnosed with MS also... then yes, this terrible muscle pain has taken over now. My neurologist did a muscle biopsy after a slew of genetic tests and has diagnosed me with idiopathic small fiber peripheral neuropathy. Most people seem to have burning though rather than aching, sharp, crushing-like pain. Have you found anything that works for the pain??