Looking for advice/opinions on Botox for TMJ?

I have very bad tmj and I clench my teeth at night. this leaves me with headaches that go into my ears, temples, and deep into my teeth/jaw, I don't have dental insurance and getting a mouthguard would be something outrageous like $500 or $900, and to visit a TMJ specialist, which my reg insurance doesnt cover ( *rolls eyes*) is insanely expensive. The receptionist quoted me something like $1500 for a visit without insurance. I read awhile ago that some people get botox injections for TMJ. Has anyone had experience with this or know much about it? Any MD's who could give advice? Would I need to go to a TMJ specialist to get the injection or could I get it from the doc at my local spa who does non-invasive procedures? Thanks!
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