I'm so sorry samara. I would prefer to be wrong about tmj surgery.
I had a type of cortisone injected into my jaw joint a couple of years ago and did not notice any help. How old are you? Do you have a weight problem? If you are on the younger side, steroids can deteriorate your body over years if taken too much. I don't know what the "too much" is though. My tmj doctor didn't want to do a cortisone (a type of steroid I think) when I first asked in my 40's. He felt I was too young. Steroids can also make you gain weight.
Because of your situation and if you are in pain, I think I would take the steroid shots. But you need to do what makes "sense" to you and will help you the best. The shots do hurt so ask the doc if you can have nitrous gas or even a valium an hour or so before getting the shot. The very first shot I had actually felt good (an anesthesia was used, not steroid or cortisone). It surprised me. The needle going into the joint felt good. How strange. I've had a few since then and they have all been buggers. Once, some fluid got into my ear. This for someone who has a phobia about water in my ears, ewwwwwe.
Sheesh, I shouldn't be scaring you to death, sorry. It only lasts a minute.
It might be a blessing if your right jaw is deteriorating. Tmj pain is caused by all the little things that happen when our bite/jaw is out of balance. I know others are living without jaw joints and they are pain-free, so maybe your body is trying to balance itself out, heal itself.
Of course, this is all a wild guess. Well, not about the balanced bite/jaw.
I sure wish doctors knew what they were doing before they cut us up. I definitely feel for you.
Are you going to pt or mt? These would help you get some function back. Also help with any pain you are having. What about pain management?
I sure hope and pray that you get the help you need soon.
God bless...
Carol