rotten brain with chemistry

Last night, when I was reviewing for Chem Lecture, i look like this.
I was like memorizing only those essential formulas and merely listening at my iPod. I even slept early, too. But too bad, Ruth and Cindy told me today that I look haggard, really. Mukha daw akong pagod na pagod like being soo sleepless. Could this be a start of stress? Hope not yet. Hope not now. I have my Educational Psychology quiz pa tomorrow. I feel like sleeping now. :D