I feel down stairs backwards 5 steps 6 mons ago i hit back of head neck and upper back still hurts to turn neck all the way what could be causing pain?

See someone: You should see your primary physician or a spinal specialist. You may have a fracture that did not heal or an injury to one of the joint. While it could be muscular, a thorough history, exam, and testing is a good idea since it is stll bothering you. You definitely should see someone if you have other issues like numbness, tingling, weakness, trouble using your hands or walking.