Why am I so sleepy?

I wonder if it's the weather. Or traveling. Sometimes traveling makes me tired. All I want to do is nap, and I can nap. I can actually lie down and fall asleep for an hour and then be fine, but within 3 hours I'm tired again. It could be the Celexa or even the Abilify. Though I figure the side effects should have worn off by now. It's been a month. And it's only random tiredness. Some days I'm fine. But I'm tired more often than not.

But, of course, I can't sleep at night. I mean, I sleep, but it takes me hours to fall asleep. In the middle of the day I'm out like a light, but at night I just lie there and think. Perhaps that's the real reason I'm tired when I get up. And of course, I've messed up my entire sleep system now. Sigh.