About 6 weeks ago I joined a gym to learn ground fighting. Last week my knee popped out of place. I hurt it when I was younger playing football and it's happened before, but I've never experienced any pain. Last week my knee popped out of place 5 times and it hurts pretty dang bad. I've put ice on it a couple of times, should I be using heat instead? There isn't really any swelling, just soreness. My leg can still bend and I can stretch somewhat, but not near as well as I'd like. Any suggestions minus a docs appointment? I don't mind seeing the doc but I wanna try some suggestions along with some time off first.