It's, like, what - 8:30?

I am so so so so tired. I have been so so so so tired for about a week now and sleeping doesn't help. I doze off on the way to school, I doze off during lectures, I doze off on the way home from school, I sleep hard when I'm home. I sleep for hours more than I normally would. I end up curling up in bed with a book about 9 and falling asleep book in hand, lights on. It's really starting to take a toll on me. I'm so exhausted I've become irritable and my mood changes like that. I'll go from really happy to just immobilized with depression so quickly. My overbearing mood, though, is sadness. It sucks a lot. I'm just so sad. I want to cut, I want to harm myself in any way possible. I've been snapping a hair band (with a metal thing on it) against my wrist constantly for about a week and I've torn my skin so raw it bleeds. There's blood on my bracelets and my hair band every day. Blood dries on my wrists and I look as if something's attacked me. Blood oozes onto my fingers as I hook them onto the hair band to snap it. Blahhh. I'm rambling. I'm just so tired.