Phone a Dentist. Ask the Dentist if they know about TMJ. If they do see the dentist. It is a therapy that Dentists provide that corrects the pain that occurs at the jaw. Often when this does occur there are associated headaches, etc. In fact often other problems can occur too!! Like back aches etc Dentists have found that sometimes it comes from the jaw where it meets the skull. From my understanding nerves or blood vessels are caught in the socket or something like that and the TMJ therapy method relieves or removes the problem.
Cannot remember the full terminology for TMJ rather a mouthful.