I hurt my ankle 2-3 days ago, what could be the problem?

About 2-3 days ago I put too much pressure on the left side of my ankle (you know where the bone sticks out) I kind of jumped when I done it and it's been really sore ever since. It doesn't look bruised and I don't think its swollen but it's pretty sore and now, when I try to walk properly my foots clicks... The pain is going right up to my knee and my foot/ankle feels heavy and weird. I don't want to go see a Doctor unless it's swollen but what do you think could be the problem?