stop grinding my teeth

... I have messed up my teeth real good. Chronic clenching and some grinding have worn down my teeth and caused near-constant inflammation of the ligament that runs along under all the teeth on my lower jaw. That inflammation pushes my lower teeth up and causes extreme sensitivity in the nerves (like a cavity!).

I’ve had a nightguard for over a year and wear it 99% of the time but it doesn’t seem to help the habit – just protects the surface of my teeth at night.

I don’t know what to do. I’m just so stressed all the time. Argh!