All of today I've had this weird pain on the left side of my head. Its like, deep in my ear, where my jaw bones meet up, so I cant tell if its an ear problem, or a muscle problem with my jaw. Anyways, its just overall somewhat painful when i move my mouth. When i move my lower jaw to the right (top stays still), i hear this fuzzy/popping noise in my left ear (so, the muscle is getting stretched, causing this sound). When i bite down it kinda *resets* it, and hurts a bit. I know i've had this before, but really have no idea what the heck it is. Any ideas?