Can't fall asleep

I'm so tired, but I can't fall asleep. I try to relax, but it just won't do. I'm hot, then suddenly cold. I can't fall asleep, but I can't keep staying awake. It's impossible. Thinking about too many things. Feeling too many things. I take a lot of things out on myself. I have done so tonight. I tried writing down some of my thoughts, but...yeah. I don't know. I guess it's pretty brutal for others to read, but to me, that was actually quite weak. I didn't cry most of the time I was typing. But no one will get to see it. It's personal. Private. Too much swearing too. Calling myself a "fucking dirtbag" and such. But I just can't fall asleep...