Do you know if you grind your teeth at night? I do when I'm stressed, or so I've been told.

When I was younger, because of the grinding, I had a splint made, that I wore at night. Now you can buy night guards otc at the drug store; they're kinda pricey...but that might have something to do with it? I was told I had TMJ, don't remember what that stands for, but its some jaw disorder related to stress. I notice myself clenching my jaw and have to mentally make myself stop. I can't even chew gum much.