About a year ago I started clenching my jaw and grinding my teeth in my sleep. I realized I was doing this after waking up a few mornings with horrible headaches and pain in my jaw. My dentist fitted me for a mouth guard (which I wear every night) and then things seemed a little better. Well for the past 2 months I feel like I am doing it more than ever. I wear the mouth guard every night but I am waking up with jaw pain. Is there anything else I can do or take to alleviate this?