I'm tired

...but not sleepy.
This has been a re-occuring problem for some time now. Part of it is work stress, I'm sure. I can't seem to stop thinking at night. I lie in my bed, listen to my fan and think. I think about things that I can't control, especially not at 1 o'clock in the morning. If I could take my brain out at night, that might help. Other than that, I don't know how to fix this problem. Two nights ago, I was in this same position. In my comfortable bed in my comfortable pajamas with my white noise at a very comfortable level and my comfortably dark, cool room. The conditions couldn't have been more conducive to a good night's sleep. But I couldn't get sleepy. So I decided to get up (at 2 am) make myself a cup of chamomile tea and watch Glee on DVD...I fell asleep on the couch. Maybe I should try sleeping on the couch every night, I mean, any sleep is better than none at all, even if couch sleep is pretty poor quality.
It's almost as if I'm becoming nocturnal, I get so sleepy during the days that I am tempted to take a nap on the sofa in my office, and some days I take a nap when I get home from work. Which just makes sleeping at night just that much harder. Which, in turn, makes getting up in the morning that much harder, which makes me so sleepy during the day that I need to take a nap when I get home...and the vicious cycle continues. I don't know what to do. I can't even talk to my mom about it, because she worries enough about me as it is. I don't need her to lose sleep over my loss of sleep. Her not sleeping isn't going to make it any easier for me, and I don't want to give her any more reasons to stress out about me, since I'm the more gray-hair inducing of my parents' children, they don't need to add my insomnia to the long list of reasons why I can't take care of myself.

I'm just so tired of being tired. I just want to sleep.
I've tried tea and tylenol PMs and if Little Bo Peep has lost her sheep and doesn't know where to find them, it's because I've counted them all, and Mary's Little Lamb, and every other sheep for that matter. So much fleece...