Is it a muscle or nerve/neuralgia pain?

I have been dealing with constant jaw pain under the ear lobe, jaw line end and neck on the right side. Have ear ringing, soreness, constant feel of something stuck in throat, jaw clicking and grating sound. Went to multiple doctors and dentists. No diagnosis or relief yet. I am currently doing Physical therapy as per OMFS suggestion. I did MRI of Tmj last week and attaching the report. It shows up sigmoid diverticulum. Don't know what that means. Is that something serious? I have constant sore and burning achy type pain under the ear lobe and neck. I tried to self massage my muscles in the face and neck. I massaged near the green dot on the attached picture ( near cheek bone above the upper jaw), it hurts like sore and burning in my usual spot under the ear lobe in the lower jaw. I never massaged in that cheek area before. Today I pressed on a spot and it hurts on the lower jaw under ear lobe. Is it a muscle or any nerve pain? Do I need to see neurologist?