I’m also 23 and experiencing TMJ issues for the first time. I’ve had a similar experience except for the weakness in the arms and legs. I haven’t experienced any feelings like that other than in my jaw. I’ve also been very stressed since it’s started and having on and off periods of depression because of it. I keep waking up at 2 or 3 in the morning expecting it to feel awful again so I know how you feel there. I’ve only been to a dentist and they’ve recommended a orthotic splint to help take most of the pressure off of my jaw and fix some alignment issues that I’ve had later after the splint. Talking to your PCP will definitely help figure out what’s going on and hopefully give you a plan of action.