Ankle problems- please help?

I am a soccer player. this is my year playing, i was at practice last thursday and my ankle got twisted. It has been hurting ever sense then and its gotten very bad, i can barely walk on it and when i move it side to side it hurts very badly and its swollen and the bone is sticking out. (it is the back part of my ankle that's hurting like where your achilles tendon is. when you push on the back side of my ankle or foot it feels like there is something rubber inside and it hurts awfully to push on. what could be wrong with my ankle/foot?