Hi Laura -- I hope you've found some relief by now, but here are some ideas.
Ice your jaw and you should probably take some anti-inflammatory med. Your tmj is obviously in an acute state.
If you have health insurance, go see a doctor that is open to sending you to physical therapy. Don't let the doc write tmj in diagnosis as many insurances will kick that to dental insurance, which doesn't pay much.
I recently had an extreme flare up, too. My doc wrote that I had myo fascial pain of neck and head. PT has been helpful.
Also, chiropractic can help -- but I find that better as a way to keep it in check and less effective when it's very active. I see you live in Romulus. You have a very good chiropractor near the high school -- Jeremy Shaft. I have been seeing his parents (both chiros) for 20+ years, and Jeremy has treated me a few times, too.
I noticed no one answered yet... Some other options are injections I think, cortisone for pain? and maybe "irrigation" I've heard, it sounds like something has to be done from the inside.