Insomnia

I've never been one to have trouble sleeping (actually I've had quite the opposite problem in the past, being able to fall asleep in mid-conversation) but for some reason for the past couple weeks I haven't been able to fall asleep. I only got 2 hours last night (actually from 7am-9am) and 4 hours the night before. The strange part is that I never really feel tired, even teaching kids all day long. I think at some point I'm going to have to crash, but until then I'll just take advantage of the extra hours I have in the day. If I can't fall asleep on Friday I was thinking about hiking up a mountain nearby in time to make it to the top for the sunrise.