I am not a teen, but I want to tell you not to give up what you love because of ITP! I am an avid horseback rider. For two months my platelets were below 20 so I couldn't ride and ended up losing my lesson slot at the prestigious stable I was taking lessons at. However, now that the NPlate is working, the stable tries to fit me in wherever they can. Some weeks I ride, some weeks, I don't. Treasure the time that you are doing what you love when your platelets are high enough. (I know that this sounds like such a stupid adult thing to say, but you'll find that the happier you'll be in life and the less upset you'll be when you can't participate in your sport.)