It's crazy what parenthood will do to you.
When the twins were first born, and for the next year or so, I was horribly sleep-deprived. I'd fall asleep if I got even close to horizontal. I fell asleep feeding the babies. I couldn't remember anything, and trying to concentrate on driving was nigh on impossible. It was awful.
Now that the girls are sleeping like champs, I have insomnia. I just can't sleep. The doctor told me Benedryl was my friend; will put me out and isn't habit-forming. With all respect to my GP, Benedryl ain't takin' care of business anymore. I've got 3 in my system as I write, and it's after midnight.