Hi, I ve been struggling with lower back problems for about 7 yrs. Have had many drugs, PT(now on maintenance program), epidurals, and find relief at times, but increasing symptoms & Pain. Have had numbness/tingling/elec-type nerve pain increasingly for past couple years. My primary care physician sent me to a neurologist about 2 yrs ago, and we ve experimented w/many drugs that I cannot tolerate side effects. What next?