Overwhelmed by Academic Fatigue and Anxiety

Do you ever feel like the moment you start doing any academic work a wave of severe fatigue rushes upon you and your eyes become heavy as your mind becomes foggy and you start to lose motivation while the anxiety of your future and the deadlines it holds begins to overwhelm you with a sense of impending and partially inevitable doom? And even caffeine, that magical drug, begins to lose its efficacy and all you can do is stare at the greek and wonder "why"...