Sheley,

Polyneuropathy is just a word for how many nerves are affected, as Glenn said.

I have something similar to you, autonomic and sensory peripheral neuropathy and I have a diagnosis of Sjogren's and/or some additonal autoimmune process. Often times when you have a polyneuropathy, especially involving autonomic nerves, the docs will do exhaustive testing to find the cause.

Autonomic Neuropathy can be difficult to manage, but it can be controlled to some extent. The biggest thing is getting to know your body and which measures help and which ones do not.