Joan,
I do not believe that a neuro who specializes in PN would send you to a pain clinic.
That's a Dx from a neuro who is at a loss with knowledge of the condition.

My Neurontin wasn't working very well after about 6 yrs of increasing dosages.
(up to 4200mgs/day). My neuro (head of the dept at Hopkins) was out on a surgical leave, & I was rolled-over to another, younger whipper-snapper foreign exchange neuro. He tried Cymbalta and another med, gave up, & then sent me to the Hopkins pain clinic. Like a sheep, I went meekly.
That was a real nightmare.
After about 10-11 mos of various opiate (severely constipating) & non-opiate meds and trials (titrate up...titrate down, etc) Lyrica eventually - finally, became available on the market.
I went back to my original neuro and we decided to go for it.
I've been satisfied (so far) with the pain control using Lyrica & Tramadol (mildly constipating - fiber helps).
Pain clinics are not the answer for me.