Have you gone to your dentist? I too suffered from severe headaches and neck pain radiating down to my shoulders and back from night time bruxating. I would grind my teeth so hard in my sleep that I was causing damage to my jaw bone, teeths and creating terrible pain in my neck. Please get fitted for a night guard. Also, do you drink or eat dietetic sodas or foods. STOP! Immediately. They are poison to your system. I hope this helps a little.