I also have a diagnosis of IH. I was diagnosed back in January (great way to start the new year).

Are you being treated for your IH? I currently take Provigil (200-300 mg/day). I don't fall asleep at work anymore, and as long as I take it as soon as I get up in the morning it doesn't give me horrible insomnia. But I still sometimes want to sleep all day on weekends.