Oh another thing: remember how much success u hav had. Think about how far you've come. When you are feeling overwhelmed, try writing down your emotions and thoughts. It helps sometimes to get it all out there. And then u can also bring it to t the next time you see her/him.

In the meantime, and until you get on medication, take it easy: only do what is vitally nessisarily as far as responsibilities go for school. Make sure you are getting enough rest (8+ hours if possible). Eat all three meals. Both of those can affect concentration and help keeping your mood as stable as u can until your medicated.