Does your brain crave balance between left and right brain thinking?

I have spent maybe 85–95% of my time over the last 4 months studying and doing scientific stuff. There are five more days until final exams and the semester ends. I love what I’m studying, but right now all I want to do is listen to music, watch TV and movies, read about fashion. Heck I would love to spend 12 hours in an art museum or making art – sculpting, painting, photographing, even just gluing some glitter on a card! Is there a scientific explanation for this? What is it? Do people work more efficiently when they balance their time between left/right brain thinking?