I sleep on my left side curled up. Now I have been having pain from neck to middle of left back and pain/tingling down left arm/hand. Pinched nerve?

Cerv radiculopathy. Neck pain and/or pain around the shoulder blades with associated weakness and/or numbness into the shoulder, arm or hand implies a pinched nerve from either arthritis or a ruptured (herniated) disc. If pain tolerable and symptoms better, ok to watch and wait. Nonsurgical treatment includes pt (i prefer mckenzie exercises), arthritis meds, and nerve blocks. Surgery if symptoms no better or worsen.