Butterflies in my stomach

Ay, the test #4 is coming soon. But I have been a total slacker: don't want to do any studying, just surfing internet. Well, I only need 15 points out of 100 to make it a pass on the total 4 exams. I also wish for average of 80% on the 4 exams. But I don't really want to push myself too much. I've got butterflies in my stomach. I really need to hit the book now...