I'm a morning person, too -- to bed at 11 or so, and up -- even on vacation -- at 6 or so. That having been said, I also worked straight nights for 9 months long ago. I've also done my share of rotation to nights. It's not impossible, but I'm concerned about your committing yourself to nights when you are a single mother. Depending on the age of your children, that can be dicey, and even if they are a little older, you might not want them left alone there for over 12 hours straight. I agree with flowerchild: negotiate hard, and GET IT IN WRITING. If they want you badly enough, they'll accomodate you.
Even a morning person can survive nights by some tricks. They include (for me, at least):
1. I go to bed as soon as I get off work. If the sun's out, wear sunglasses, to try and trick your body into thinking it's still dark.
2. Make the room where you're sleeping as dark as possible.
3. White noise, please: a small fan at your head keeps you cool, and blocks out sound.
4. An answering machine, of course. And turn off the telephone ringer.
5. Eat lightly at work: no heavy carbs, lots of protein, and caffeine. I'm not a coffee fan, but I AM a Southerner, so I always bring along a big thermos of iced tea.
6. If you have to work nights, you CAN get used to it, though it will take a while. And I found that nights was the time I often got to do real nursing, as opposed to management tasks and shuffling paperwork. Nights bring out the fear and the pain in your patients. You may grow to like the chance to do what you are there to do.
Jim Huffman, RN