For over 1 yr, had numbness/tingling/shooting pains on left arm, leg, and fingers. Happens on/off. Mri of brain/spine was normal. What 2 do next?

Please get a. Second opinion. Many situations are difficult to diagnose. Continue until you find the answer and try not to loose peace of mind in the process.
Blood work. Has your B12 level been checked? Other nutrients? This could be metabolic - certainly nerves being affected.
Neuropathy. You should see a neurologist to further evaluate the nerve symptoms. If the scan of your brain and cervical spine was normal, then perhaps you need a thoracic spine MRI and blood analysis for certain causes of peripheral neuropathy.

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