Damn, Biochem took me by surprise!

So I've been studying Histology for a week, thinking that Biochem is still sometime away and I simpily focused on Histology and forgot about it. Until just a while ago, I called up my organizer to see how many days I have to relax after the Histology exam. Then my jaws droped. The Biochem exam is JUST THREE DAYS after the Histology exam, which means I heardly have time to prepare, and I havent touched the Biochem book for a long time!
Damn was I stupid!