Tmj cbct scan. Any joint damage seen?

I have right lower jaw pain under ear,ear and neck pain for 5 months now. I went to an ENT and no infection in ear. I went to dentist, xrays were normal. Dentist suspect a tooth fracture on#46. I went to Endo and he couldn't see any root fracture. He see mild sensitivity to cold and bite on one spot on that tooth.suggested to do RCT. My symptoms got worse like, ear ringing often, constant feel of something in throat and neck is so tight and stiff,sore pain on top of head above ear.My dentist also sent me to tmj specialist to check if it's tmjd.  I did rct 4 weeks back. Still same symptoms. Went to tmj specialist and he took CbcT scan. He said it's myofacial pain, muscle tightness and jaw joint issues. Don't know which one causes the other. He gave an expensive treatment plan for day and night guard. I have been told to do PT too. My pain is constant burning pain in jaw exactly under ear and neck. I have mild swelling in jaw and neck. My dentist said it could be tmjd or eagle syndrome.