TMJ / Teeth Grinding

Hi all, so this morning I woke myself up grinding my teeth and clenching my jaw. I used to do it a lot when I was a bit younger, but it seemingly went away until recently. I went on Amazon to check out mouth guards but there are so many choices!! Does anyone else grind their teeth too & use a guard for protection? My jaw was SO sore & it gave me a headache first thing as I started my day 🙄 if y'all have any recommendations for what's best to help out, it's much appreciated!! 😊