I Have Fibromyalgia, Several Bad Disk, Hypothyroidism, High Blood Pressure,

I have fibromyalgia, several bad disk, hypothyroidism, high blood pressure, GERD, Glaucoma, Neuropathy and arthritis. I am seeing pain mgmt. for severe pain. They have me taking Percocet , Ibuprofen, and a muscle relaxer along with spinal injections. I know foot pain is associated with Neuropathy, but I am now having increasing pain in both the feet and the legs and increasing muscle weakness in both arms. My legs cramp to the bone and my feet turn inward from the cramping. I'm taking everything the Dr. prescribes and feel that I'm only treating the symptoms and not the source.
Can you help me figure out what this condition is?
Thank you,
Debra