Hurt Ankle?? what is really wrong?

I hurt my ankle in bball today. A girl was holding the ball above her head and i jumped and can down landing on her foot. I just stayed on the floor until the ref called time out. Then i put a bandage to support it on. I went to the doctors and they xrayed it. then they just put my fooot in an ace bandage and said call back in two days to see if it is fractured. I can walk, well linp and it hurts when i walk. sprained this anle badly about 10 years ago. Does that have anything to do wit it??