I tripped over a rope while running and jumping, I landed on my left ankle (rolled in). Immediately after, the pain was extremely painful -- I felt nauseous putting pressure on it, and had to hop on my other ankle. The next two days it was swollen to the size of a tennis ball (e.g. the top of the tennis ball = the swelling over the ankle bone/towards the back). From the first moment, when I took steps, it felt as though something was snapping over the ankle bone and it's very painful. It's four days later, the swelling is going down. There is no constant pain, and I can generally put weight on it. I limp a little. However, especially on stairs, the snapping over the bone occurs -- I can't hear it, I feel it -- and it hurts immensely. Do I need medical attention? Or should I just continue to ice it?