How can I tell if I sprained my ankle?

I fell down a lot of concrete stairs (haha and everyone laughed) but when I got up I could tell something was wrong with my ankle. I was limping and it hurt to walk. When I sat down the pain was mild but I can barely walk. My ankle swelled up a lot and it's popped a few times. https://share.icloud.com/photos/0GDx7yrMbLVr2n8C32vTe8i_A#University_of_Georgia

Got to urgent care but I can tell you that you did.