Hi.
I dealt with TMJ about 13 years ago. I suffered from major headaches, severe neck pain, shoulder pain and my left arm had limited mobility. After seeing several dentists I found one of the top TMJ specialists in the country. The specialist was Dr. Harold Gelb. Dr. Gelb helped me tremendously. He is the creator of the MORA appliance (Mandibular Orthepedic Repositioning Appliance). It helped reset my jaw position and took the stress off my Mandibular joints. I also got assistance by seeing a chiropractor and a massage therapist. Eliminating as much stress as you can will also help. Here is a link to The Gelb Center http://www.gelbcenter.com/.
I hope this helps.