What do you do when you can't sleep?

I have extraordinary difficulty sleeping. The slightest noises catch my attention and I can't but focus on them, especially if the noise doesn't have a steady rhythm. I find myself trying to predict when it will next occur, which makes it impossible to sleep. If it is too hot or too cold, I have trouble sleeping.

Ever since I have started to work the night shift, it has become worse, because I can't resynchronize my body's internal clock to work with my schedule. I'm fairly certain I have non-24 hour circadian rhythm syndrome, because when left to my own devices, my sleep time naturally moves up further and further into the day until I'm sleeping on a normal schedule... but only for a few nights, until my sleep time moves into the night again.

As for what I do when I can't sleep, well... I've tried taking Lunesta. At first it helped a little, but it lost its effectiveness very quickly. It also left me feeling extremely groggy, like my head was filled with warm cotton balls. Melatonin makes me feel extremely relaxed, but I still can't get to sleep. If I do manage to fall asleep, I have strange dreams.

So usually, I just toss and turn until it's time to get up and go to work, because nothing helps me sleep.

Jam it back in, in the dark.