Your neurologist may order nerve conduction studies & EMG to rule out large fiber neuropathy. However, these tests do NOT detect small fiber neuropathy. You will need a skin biopsy to determine if this is the problem. Then of course, (if one of these is positive for PN), you will have to try and figure out the cause...and that can be difficult.

Did they check you for diabetes? If not, then it would be a good idea to do so.