What do you recommend for an unstable bite?

My jaw basically shakes all the time on one side, with muscle spasms, limited opening and nerve pain. I can’t decide what route of treatment to pursue, and have been recommended either a fat graft for my perforated disc or an orthognatic surgery for my crossbite. Unlikely, but if there is anyone who has been in a similar position I would love to know what you ended up doing!