Fibromyalgia is characterized by widespread pain in all four quadrants of the body for a minimum of three months and at least 11 of the 18 specified tender points -9 pairs on either side of the body along with the experience of chronic widespread pain .The tender points lie in front neck area ,back of the neck ,back shoulder area, shoulder blade area ,elbow area , upper outer quadrant of the buttocks , rear hip and Knee . Associated symptoms of Fibromyalgia include fatigue ,morning stiffness , sleep disorder , menstrual cramping along with numbness and tingling , dizziness , skin and light sensitivities.
If you do not have symptoms other than back pain , it may not be Fibromyalgia . There could be other causes of back pain and headaches that include nerve impingement in the back or stiffness of the neck muscles . Please go for an MRI of spine with contrast , EMG and consult a neurologist for the diagnosis and treatment . Hope this helps you . Take care and regards ! .