sleepless nights

i just can't sleep no matter how tired i am. energy surges from nowhere under the moonlight. every time i close my eyes, turn off the lights, my mind starts to zoom all around. entertaining it may seem, enjoyable it may feel, i've got 6hours of classes starting 8 in the morning and this will be one way to kill it well. i've alway been a night owl but this time it seems like it's something else. feels like something is bothering me but i just don't know what exactly.