I'm very sensitive sleep-wise, too. I need to retire at the same time each night, need to let my body/mind process/unwind, and then sleep.
I've had two late nights this week, out of necessity, and its thrown me off.
I start to get hypo fast.
Tonight I will do all I can to retire on time and to sleep as well as possible.
I am already "ready" (in my mind) and looking forward to it. I need to be as stable as possible.

WC