Oh my aching ear!

So after a week of an earache I finally make it to the dr. My ears are all clear which is good, but I have TMJ syndrome. Basically, I'm clenching my jaw or grinding my teeth at night and this causing all my pain. It explains why I have been waking up with terrible headaches and why the ear pain subsides during the day. Now I have to figure out what is causing the tension to make me grind my teeth so fiercly at night that it is making the muscles in my jaw hurt. Any ideas??