I should have been more clear in my reply. Pregabalin does help some with burning symptoms. I have never heard it being used or help with autonomic dysfunction you described...as in the 'function' aspects of initiating and/or complete emptying of urine.

There are urodynamic studies for some of the symptoms you describe.

http://en.wikipedia.org/wiki/Urodynamic_testing

As for other aspects of autonomic dysfunction/neuropathy and/or dysautonomia, there are various different tests for cardiac related problems as well as GI related issues.

Do you have other symptoms?