How do u get rid of sleepiness without caffeine

Finals week and im COOKED and for some reason ive been feeling so sleepy like i never feel sleepy but JUST WHEN FINALS WEEK IS HERE I JUST HAVE TO FEEL SLEEPY ASF 24/7. Anyways caffeine literally doesn't do shit on me, coffee tea, or energy drinks just makes me have diarrhea and i actually feel even more sleepy after drinking them so how can i get rid of sleepiness without caffeine? NEED URGENT HELP