i know what the feelings like, i dont really have pain with it (but i usually feel ill, which fades throughout the day). Usually i just focus on trying to be focused... haha it is tough. sometimes i pinch myself to keep paying attention, or doodle to kinda just let my mind wander if i'm in a class that i can afford to zone out for a moment. Another thing i sometimes do is just doing some kind of work- so my mind is busy but i can still kinda listen at the same time. I know you can get through this!!! Good luck!