Dammit, get some sleep Sami!
I'm in a situation where we are required to work 12 hours a day, 7 days a week. A lot of guys in my shop sleep 5 or 6 hours per night. They laugh at me because I'm almost always in bed with the lights out for about 9 hours, sometimes a little more. But, there's really NOTHING else to do here. On nights when I work out, it's a little bit less, but usually 8 as a minimum. Even when I'm sleeping 9 hours my greedy body usually wants more once the alarm goes off in the morning.
I've gotten into the habit of taking a single Benadryl before I hop in the shower at the end of the day. This usually puts me right out.
It's funny, you can't find a single sleep aid in the BX/PX, but there are all kinds of pills to hop you up, not to mention truck loads of energy drinks, some you can get for free at the DEFAC. Guys in my shop drink at least a half a dozen of the free energy drinks during the day.
The "off-label" use of Benadryl is pretty common here I think.