Car Accident = Swollen TMJ????

I am the lisping lizard right now. I got into a car accident... got rear-ended (I was the passenger in the hit car). The girl driving the other vehicle said she "blacked out" and couldn't remember hitting us. UH-HMMMMM.... my friend suspects that she was on the phone but that is another story. Well at the time of impact and a little while after, I didn't feel anything. Why was it 7 hours later, I can't open my mouth fully and my jaw is swollen??? Now I expected whiplash and a bad back, but not a swollen jaw. Apparently it's my TMJ that is swollen, and my ears and teeth are suffering because of it. I went to the walk-in clinic and got a rx for some pain killers and anti-inflammatory pills. Hopefully those work, it they don't I will have to go the emerg. which I am really not looking foward to. It's a good thing that I have a doctors appointment already booked for Monday... we will see what happens.