Lilbert - actually everyone has TMJ - its the name of the joint
sorry I work in the dental profession
Its called TMD when you have issues with it.
Feather - I'm sorry this happened to you! It sucks! I had this happen to me too earlier this year, and it was so annoying to not be able to close my mouth. One thing to do, if you can, chew on the side that was 'dislocated'. Ice can help, and my former boss who was a TMJ specialist would suggest a "cold, hot, stretch". You ice it, then use a heating pad, and then gently stretch your mouth open. I did that earlier this year, and that helped a lot. Also taking anti inflammatory meds can help - ibuprofen if you can take it. And just automatically taking it every 4 to 6 hours is best - even if you aren't in pain at that 6 hour mark.
Getting a properly fitted bite guard can help. The one boss I worked for made excellent bite guards, and I'm holding on to the one he made me as long as possible.
When this happened to me earlier this year, it actually helped me lose a few lbs. I had to eat really slowly, and chew my food carefully - and would actually feel full sooner. I still ate most regular food, just made sure to not bite into anything I had to open super wide for - like a sub or apple etc. I cut everything up really small, and just ate less because I felt full because I was eating really slowly.
And yeah, it can take a few months to heal. When I talked to my current boss about it - though I knew there wasn't anything he could really do at that point - he said it can take up to 8 weeks or more to heal. And it did take just about 8 to 12 weeks for it to feel normal again.
Hope you feel better soon!