I Have Insomnia

I don't know if it's actual insomnia or whether I just don't need much sleep. I'll take a Promethazine to go to bed, but I'll wake around 2am and that's it for the night. I usually lay around until 4, then get up. I seem to function during the day without too many problems, though afternoons can get a bit fuzzy. And now that winter is coming, the 4am get-up's are much less pleasant.