Why does my ankle hurt? What should I do?!

Why does my ankle hurt? What should I do?

I am a 13 year old runner,dancer,skier,soccer player and just really active. I have moderate flat feet and are painful. So my podiatrist gave me custom arch supports. Yes, I do notice a difference, but they don't take all the pain away in just my right foot/ankle/knee. Lately I have been having trouble with my knee but that's a different story. After about 1 hour of wearing my arch supports in 200 dollar shoes my ankle starts to hurt. It gets progressively worse as I keep going. It hurts on the outside right on the round bone. What should I do and what could it be? Thanks!

4 weeks ago
I do know what is wrong with my knee...so don't worry about that. It's weird though because my knee pain is mostly in the front part. and on the inside. Ankle just bothers me most of the time. Like an ache.

To be honest I do not think that you should be asking people on the Internet I think that you should definetly go see your doctor. This has happened to me before and it turned out to be Severs and Osgoodslotters disease. (That's mispelled) I was on crutches for about 3 weeks. Trust me see a doctor.