((PS))) Good for you! You'll figure it out.
I find a combination of valerian and passion flower (at least those two) in larger doses than what the grocery store product offers, does me well. Dose of at least 500mg of valerian (found at health food stores) taken an hour before I want to be in bed works. Once I begin yawning, I know I'm ready.
Your mission, then, this week is to keep track of what you take when! If you get nothing else done but this, then you've succeeded!