This makes so much more sense now. I was told last spring (2011) that I had TMJ- also clencher. I was looking into the night guard as well. I put it off as I had maxed out my Flex medical account. My jaw would get really tight and then with slightest movement it would crack so loud an entire room of people would stop. It sounded like a breaking bone. Then symptoms went away and I kind of forgot. Until very recently- last few weeks pain has also started back up. I wonder how connected they really are??