Oops- didn't mean to post so soon.
Peripheral neuropathy, if that's what you have with your hands and and legs, is something the neurologists don't know all the causes of and they can only identify the cause in a certain percentage of patients. See private message for more info on peripheral neuropathy.
The pains in your ear- if infection has been ruled out, have they considered a TMJ problem on that side? That can cause pain in the ear.
Anxiety can cause a lot of very real physical symptoms. The doctors should test for all known medical causes of the pains you are having.