Sorry you're having so much trouble with the sleep. I know how important it is, and I know how frustrating it is when it just doesn't come. Lately I've been incredibly sleepy during the day even though I'm getting adequate sleep.

Is it possible for you to nap during the day? I work in a library, and there's an area in the stacks I used to like to go for a nap on my lunch break. Unfortunately a really rude student has been assigned to a carrel in that area, so I don't go there anymore. Sometimes a nap helps; sometimes it makes me more groggy.