I don't think I am going to be much help here, but have a look at www.dentalhelp.org. Or find a dentist on the internet that is in to alternative health and go and see them. Don't bother with Dr's and dentists who only believe you are unwell if your blood work is abnormal or if you have something they can visibly see on a scan.
I am in a similar situation with my jaw and was told all sorts of things, one being I was depressed. I did the night splints etc and it did nothing, but I persevered because I was seeing a practitioner with a bioenergetics machine that was indicating I had a dental infection. Well I had an abscess. I went to an alternative dentist in Sydney and he removed the tooth. You couldn't see the abscess because it was behind the tooth. I also had a necrotic jaw bone and I begged the same dentist to operate and he found the gangrene. He couldnít perform he surgery and so sent me to an oral surgeon. So my point is persist.
There is a girl that has posted some messages on the cavitations forum and Fibromyalgia forum. Her name is Katlin and she is from Canada. May be you could hook up and talk about it.