can't sleep, yet oh so tired

It is 10:20 pm and I have been so tired the last week, and yet I can't go to sleep! You would think that since I work at a sleep lab and all that I would be able to fix this problem. Oh well. I guess I will just learn to work and be tired at the same time. Although today I messed up several times at work. Thankfully I fixed it before it mattered. It also affects my weight. I tend to not want to work out or eat right. Lord, please close my eyes. I need rest more that you can imagine!