Anybody know much about it? Had problems with it? Any advice?

Yes, many TMJ "specialists" are charlatans. If you trust your dentist, ask him. Most dentists don't treat it, but they can guide you.

Im so sorry Stevie :(

Here are some things to be Mindful of:

Here are eight ways you can help relieve pain in your TMJ and manage symptoms without surgery:
Maintain the resting position of your jaw. ...
Correct your posture. ...
Get a good night's sleep. ...
Use a hot or cold compress. ...
Reduce stress. ...
Exercise your jaw. ...
Take notice of bad habits. ...
Avoid certain activities and foods.

https://www.pennmedicine.org/updates/blogs/health-and-wellness/2020/september/tmj-pain-relief-8-best-practices-to-help-manage-tmd\\

Personally I've never had it and know no one that does.

Do more research and hope you can find your relief. .


Here is more Info on TMJ and causes:

https://adcroundrock.com/blog/5-common-causes-of-tmj-flare-ups/


Exercises to Consider

https://www.smileonstl.com/blog/the-top-6-exercises-you-can-do-at-home-to-relieve-your-tmj-pain/