Stress!!!!

Hey everybody...Long time no talk and happy March!! I have noticed lately that I have been more stressed than ever!!! I work around 30-40 hours a week and I go to school full time...I seriously work on an assignment for about 2 hours and get a C on it!!! sooo angry hahahaha :) I am obviously not taking my stress in stride like I should and handle my difficulities over to the Lord like I should :) I was wondering how do y'all deal with stress and is it common for you too???