sleeplessness...

is it a disease? it's been like this for awhile now. on some nites when i'm very exhausted and i can collapse and fall asleep. i don't think it's even considered sleeping, i think those nites i'm just knocked unconscious when my head lands on the pillow. i wake up the next morning not remembering how i crawled into bed. it's wierd. most of these nites i go to bed feeling very tired and wanting to sleep, only to be lying in bed hours later still awake.
i think i have issues/problems i can't seem to resolve. things that happened in the past keep floating back into my memory. something links to another thing and my mind is working like the energizer bunnie. i used to be able to fall asleep reflecting on the day's events. but now, i just keep thinking and thinking. my brain keeps going and going and going. i really need some time to iron somethings out in my head. i just need to put away some stuff in my head, just put them in a box and tuck it in a corner of my brain. maybe i'll be able to do that this reading week. hopefully i'll be less screwed up by the end of the break.