I have had TMJ (lest side of jaw) as long as I can remember. Have loud poppoing/clicking when opening mouth fully. Have had problems for a long time with trapezius muscle, left arm weakness/pain, chest muscle pain that radiates to the upper back on my left side. Since Nov. 2009, I have had daily, migraine-like headaches. Can't find the cause and have underwent a multitude of MRI's etc.. Never been actually diagnosed with TMJ and the doctors have not asked. I did not realize TMJ could cause SEVERE headaches that are daily. Do you think the symptoms fit? Thanks so much for your help.