I have seen some of your posts and know you struggle when generously helping others. Bless you for giving your time.Been thinking about you Ken.
It may be that you have some peripheral neuropathy which can happen when we get older. Over half of those treated with Gabapentin will have some nerve pain relief, but may experience adverse effects such as tingling/burning in hands and feet before improvement. Walk around a bit after taking Gabapentin before going to bed. Unfortunately Gabapentin can mess with tinnitus. Like with me, it appears that you are nerve and vein sensitive - most likely there's family history. Your TMJ - jaw does appear to be nerve activated. It appears this started by fluid travel from sinuses. You have a deep mandibular plane, so any jaw trauma after previously resolved infection may be cause of TMJ. Improve circulation by walking and consider trying compression stockings while doing so.
I am too fearful to pursue Gabapentin. My doctor prescribed me first Effexor XR and then Zoloft. I started Effexor XR for a couple of days and tinnitus seemed louder so I stopped. I have the bottle of 50 mg Zoloft but am so fearful to start taking it for making my tinnitus worse. I have the same dilemma as others, taking something that may help can also make my tinnitus worse. I also have not a good relationship with Klonopin. Since September of last year I have gone from 0.5 mg to 0.75 mg to tapering to 0.1125 mg and in December had a microwave overcook and smoked my kitchen and stupidly reset 3 of my smoke detectors without hearing protection, then went back up to 0.7 mg Klonopin and am tapering again.
My tinnitus is still in right ear on my TMJ side, as a continuous high pitch constant static that is somatic. My TMJ pain basically is gone but I still wear my splints. My teeth have shifted a bit as the lower jaw was pulled forward but have not pursued anything further, i.e. TMJ phase 2 teeth work, mainly for COVID-19 reasons and not sure I can justify the cost. I really have not been able to do any physical therapy, etc.
Like many, I am struggling with what to try next for my tinnitus. I have sound enrichment 24x7 which helps some but is still continuous struggle.
Well wishes to you and all who battle!
KWC