What causes upper back pain and very burning sensation that stretches along shoulders and back of my head? could it be fibromyalgia?could not bear hot

Probably not: Fibromyalgia affects both right and left sides of the body, above and below the waist. There are several things that might cause your symptoms-e.g.-trigger points (painful bands inside the muscle), facet joint arthritis of the lower neck or upper back (especially if you were in an accident with a whiplash injury), disc tears, and subluxation of the joints between the rib and vertebrae.