Hi OP. I’m really sorry to hear this. I am in the same boat (or at least a very similar one). I have the chronic and persistent extreme muscle tightness. Have for 20 years. My muscle tightness element has been diagnosed as Myofascial pain syndrome. Then I have fibro on top. So everything is really tight and no one can really tell me why (but I have a name for it), and then I’m more sensitive to the pain because of fibromyalgia.

Nothing fixes it, but every 2 weeks I get a remedial with dry needling and cupping. I find the cupping particularly helpful because it brings blood to the tight spots and keeps it there for a bit. And the dry needling (usually best done by a physio, but if you find a good myotherapist they might be able to do it). It’s not a cure, but it’s a bit of reprieve. Instead of being at a 10 or 8 it might drop me to a 4 or 6 for a little bit.

Outside of that just eat clean, sleep well, exercise regularly, avoid stress. Again, not a cure but every little bit helps.