Busted for marijuana but I feel like I need it?

I doubt you'll be able to get a medical prescription for weed at your age for any reason. Smoking it kills brain cells and it sounds like you need to hang on to the ones you have. Try diet changes, vitamin supplements, fish oil supplements are suppose to be great for ADHD. Google natural ways to cope with ADHD and see what comes up. Weed will make you less focused and lazy. Thats not the way to go.