Feeling down

I'm feeling very down this morning. Don't ask me to explain why. I just do.

I woke up at some obscene hour in the morning -- maybe 3:30 am or so. I just could not get back to sleep, perhaps because of feeling down. I tried all sorts of things. I ate a cereal bar, I took a bit of melatonin and a piece of an antihistamine tablet. Only eventually did this help me get back to sleep. (I didn't dare take the entire antihistamine tablet, since I know that sometimes makes me too groggy to wake up.)

I don't want to rely on these pills to help me sleep, since they can disrupt normal sleep patterns. I might have to use them for a while, though.

I think this has something to do with feeling down. That and the fact that my sleep was disrupted during my recent business trip, in which I had to stay awake in an airport for an entire day. Some guys sleep in the airport, but I just can't, and I don't think it's a wise thing to do anyway.