I have nystagmus and struggled through school with it - it did not realise that it was causing my problems.
I got hard contact lenses when I was 15, they were not easy to get used to and if the wind blew a bit of grit in your eye it's so painful. But I was able to run without my glasses bouncing on my nose and making me dizzy! I had to wear my glasses for swimming as I can't see anything without them but the school wouldn't allow me to wear them in the pool so I couldn't take part and got shouted at by the teachers for not paying attention
The best thing I've ever done is buy daily disposable lenses. they don't hurt, I have no problems when the wind blows. I can wear them swimming - they have never come out in the pool (I wear goggles if going underwater). They are a bit more expensive but you don't have all the hassle of cleaning them - the number of times I was on my hands and knees feeling the carpet for my hard lenses that I had dropped while cleaning! Having new lenses every day cuts down the possiblity of infections. The best thing is that you can keep a spare pair in your purse - so if you ever did lose one then you always have a back-up. In the 10 years I have had daily lenses I think I've needed my spare lenses only 2 or 3 times.
Hope this helps. If you need any other information just post here and I'll do my best to get back to you