have you looked into any oral myofacial therapists? It's essentially physical therapy for your mouth. They seem a bit niche, but I see a few scattered about the bay area when I do a google maps search. I bet none of them take insurance, but you sound like you are beyond the point of whether that should be a consideration...
I think you need to find the right expert. Your doc just doesn't know enough and is essentially giving up after trying to first textbook option.
I think you need to find the right expert. Your doc just doesn't know enough and is essentially giving up after trying to first textbook option.