So tired, that I feel like giving up

I am having a hard time with my Major now, major issue in fact. I think I did not do very well for my game theory mid term, and I have a Econometrics one coming next week. I am really not sure if I am studying the correct things. Yet, I need to have an A for both modules. Feeling so sick and tired of trying to hard, yet, doing things in the wrong way. Feel like running away from everything...