she currently uses heat and pain pills

I am 57 years old, and have tried all the remedies for comfort. such as anti depressants, pain pills, sleep meds, none of which has worked. Please can anyone help me, I'm desperate,

diease call progressive motor/sensory peripheral neuropathy and what do you do for treatment to control pain?
Taking 2400 mg of neurontin daily 2 pain pills I hve had it for 8 years I got it right after a triple bypass I currently have a double nerve stimulator in one for the arms one for the legs but no help yet my surgar runs around 75 to 80 I am not diabetic, I seen a neurolgist for 3 years all the testing he called it idotpathic and said good luck he had done all he could do, pain clinic done the nerve stimulator thanks for any help seems like nothing works