Major exams nearing and I have lost my appetite. I'm taking multi vitamin supplements. I'm losing weight drastically. I just can't eat much?

Relax... The stress from major exams will induce a "fight or flight" response in your body which will cause significant inhibition of stomach and upper-intestinal action to the point where digestion slows down or stops leading to a perceived lack of appetite. My recommendation is to relax, take deep breaths, and take things one step at a time. Try eating multiple small meals throughout the day.