Bless your heart. I'm so sorry you're dealing with this. Please join us on the peripheral neuropathy forum, ok?
I also have PN, which was caused from surgery for herniated discs. I had 2 open surgeries for discs, and both surgeries were failures.
My doctor prescribed Topamax 400mg per day for neuropathy, and it has worked wonders for me. No more burning/zapping/feeling of water running down my legs/etc. The pain is GONE. The burning was the worst -- that was just awful.. Now it's gone! Happy days.

A good share of doctors prescribe Gabapentin (Neurontin) and that stuff made me loopy and i gained about 30 lbs in water retention!!! So I asked doc to take me off that and put me on Topamax, so he did -- and no more feeling loopy, and all the water was gone, and off came the weight! I have NO side effects from it either, but that doesn't mean that others don't have side effects. There could be some. You can look them up at the top of this page, where it says "Drugs".
Best of luck and let us know how you do, ok? God bless. Hugs, Lee