Go to a doctor if you can afford to. If you cant you should ice it and use an ace wrap or a brace. You have to use crutches and put no weight on your ankle or it will get worse you will need to go to...
I've broken and sprained my ankle more times than anyone in my school would believe including my twin sister. I now have ankle problems, but that's not the point. Okay, well you most likely did break...