I have always had a clicky jaw but over the last couple of days it has become increasingly painful, the joint at the opposite side to the click hurts, is slightly swollen, I can't open my mouth wider than to fit a malteaser in (which is lucky). I can't bite down without pain and if I yawn its really bad. My teeth feel like they don't really fit together if that makes any sense at all. Its very odd. Any ideas what could have caused it? No trauma or memorable moment when it started hurting.