My neck hurts really bad i dobt know what i did but i can barely move it what can i do?

Try heat and Tylenol (acetaminophen): You can try applying heat or take a hot shower while taking some tylenol (acetaminophen) as well as ibuprophen or Naproxen as well as long as you have no Aspirin allergy or stomach problems & are not on any blood thinners. Some rest & activity restriction may help as does just time as most musculoskeletal problems get better. A soft cervical collar may also be of some temporary benefit. See your doctor if not.