Positive Power evaporated

Recently, I feel my positive power evaporated. Tired, nervous, stress...... exhausted. May be it is related to the duty so pressing, or many things need to think. When added up the factors, the above feeling make me unhappy. It seems that I'm in a cage, and it may make me to think too much. I just wanna to have a long vacation. Drop all the things, in a silent place or just playing with friends.