I'm new - but thought I might offer my .02
I've been diagnosed with Bi-polar disorder (type 1,) in these last 4 years, but I've experienced severe anxiety since I was 17 (I'm 35 now.) Anxiety is complex, as I was just discussing with my therapist today - and we both agree that although chronic or severe acute pain tops the list of anguish, anxiety slides right into 2nd place.
I clench my teeth - all day long & all night long, for 10+ years, and I've had intense massage that can't loosen the tense muscles around my ears/jaw area. I have chronic jaw pain - the only solution I've heard of is having a mouth piece made by a dentist - I can't sleep with this in, but it might work for you. Doing some finger massage around the area of your jaw can help. But most of all, trying to turn your thoughts in a more positive direction, and not focusing on any of your health problems, is going to help you get better. And I'm preaching it to myself here too.
I wish you the best - some peace!