Is my ankle sprained?

I twisted my ankle badly today on a slip and slide. It hurt for a few minutes but then it felt fine so i continued to play and later jumped a lot on the trampoline. I don't remember doing anything to re-irritate it except for jumping and running around, but after i sat down for a few minutes it started to hurt when i moved it, like it needed to be 'popped' or something. I continued to walk on it even though it was an annoying pain, but not bad but it only got worse. Now (a few hours later) its EXTREMELY painful to walk in, where stepping on it wrong brings tears to my eyes. I can move it, so i don't think its broke. Is it sprained? I dont know if i can see a doctor tomorrow since its sunday AND fathers day. Please help. thanks!