On top of chronic pain, I had (and still have but is greatly reduced) muscle clenching on the left side of my body - for some reason my body on the left side is clenching up, with this constant pulling on my head, pulling down and to the left. I also have severe TMJ, again on the left, and constant headache, light sensitivity, difficulty focusing and fatigue. It was truly horrible - imagine going through life with an extremely strong pull on your head and body. Your posture is messed up so physically, you look like a wreck, and sitting is painful as is standing. Also, you are just fighting this pull every second of the day. It never ends and you constantly have to think about it and ways to reduce the pull and the pain.
I worked with physical therapists and orthopedists for decades to try to figure out what was going on, but nothing worked. So about 8 years ago (I'm 50 now, so it was around my 42 birthday), I finally realized that I needed to look beyond the obvious causes of these types of problems, and explore almost everything, really ramping up the number and types of doctors I was seeing. Saw many types of docs: pain specialists, TMJ docs, gastroenterologists, ENT's (I have throat tightening and stomach issues too), neurologists...
Eventually, like you, found that many of my issues were from compressed nerves. And yeah, it's a struggle for you and the docs to find the right ones, but once you do, it makes a big difference. I'm not 100%, but I'd say I'm 60% there, and it's definitely changed my life, and is visible both physically and socially.
Of course, every person's body and causes of health-problems is different, so what helped for me may not help for you, but seems like you're on the right path. Keep searching, and would suggest being scientific about the process (this really helped me). I may write about my experience one day, so if you have any questions, let me know. And best of luck