I was on 25 mg for a month and a half when doctor upped my dose to 50 mg for reasons I'm not sure since I was getting relief from migraines and was having no side effects. Immediately started having intense back pain and burning, numb feet which went on for 7 weeks before I realized it was a side effect of meds. Been of meds for 7 days and I can feel my toes and am having no back pain but still having burning in my feet even though doctor put me on Neurontin, vitmamin B complex and L-Lysine to help. How long is the burning sensation going to last?