Tempromandibular Joint Disorder or TMJ is and can be a serious medical problem. I would suggest doing some research and perhaps finding a specialist in your area. Your GP should be able to give you a referral. Here are a few websites with some more information for you.
http://www.tmj.org/basics.asp
http://www.tmj--treatment.com/
http://omni.ac.uk/browse/mesh/detail...4L0039495.html
Good luck!