I had visions of my pregnancy and postpartum life. For the most part, my pregnancy went according to plan. The latter, not so much.
I sort of expected that I wouldn't get much sleep and that my body would be somewhat deranged from the birthing process, but I did not know that I would wake up (during the precious sleep, I did get) in a pool of my own sweat.
The book, How to Make a New Mother Happy ($11), talks about this very issue. It says:
"New mothers generally suffer from night sweats due to the drastic drop in estrogen levels immediately after delivery."
I found it helpful to keep a towel in bed with me and sleep in lightweight clothes. It finally went away, but I was happy to know I wasn't the only one waking up drenched.