I'm so sorry to hear that. I've had tinnitus in my right ear for about 15 years. My Dad told me I would get used to it and he's right! I only notice it once in awhile. Not that I like it but my Dad and I both had hearing loss from birth. Not sure if that's what caused the tinnitus though.
Now I hear it as I'm writing lol :D
No advice for TMJ, sorry