wrecked motivation

I started this semester determined to be more organized, disciplined, and focused. I enjoy my current classes more than last semester, so it has been generally easier to keep my resolution. Midterms are creeping up now. For some reason, all of my aforementioned motivation has shattered. I have gradually fallen behind schedule, and now I feel like I can't keep up. I have been sitting in my room for several hours with scanty results. I am drained, tired. Give me a breaaaak.