I don't know if there is any possibility of Lyme in Florida, or perhaps you have been to an area with deer ticks.... If you can possibly get a sample to Igenex Labs, do it....lots of labs do not do the very labor intensive, specific testing Igenex does.

I do have to say, my PN started with some similar stuff to yours....and I have autoimmune issues. (I would not totally rule out my having more than one cause for my PN, either.)

You are also a common age for autoimmune problems. They occur with a peak in the 20's and again in the late 40s-50's. Have an ANA done as well.