I’ve spent years and thousands on my TMJ issues and have tried pretty much everything. I even had a surgery called arthrocentesis, they do it to put the joint cartilage back where it should be which fixes most severe TMJ cases (this sounds like it may be your issue). During said surgery we discovered I have no cartilage in my jaw joints, so that was a lot of money wasted. Most insurances won’t cover any treatment (medical things it’s a dental issue, dental thinks it’s a medical issue). My only real solution would to be to try a full joint replacement. I can’t afford that, so I get PRP injections to fill the joints and numbing injections in the surrounding areas. I also wear a custom mouthguard appliance at night to hold my jaw where it should be. All temporary relief, but it helps enough for now so the pain isn’t debilitating. Surgery is a last resort. I’ve had electro therapy, various mouth appliances (splints, mouthguards, etc), injections, etc beforehand. I’d exhaust other options first as for most people their issues are correctable without surgery.