Single mom, graveyard shift- also nanny. Can I safely arrange my sleeping hours?

ummm no. you are assuming you are gonna fall asleep as soon as you clock out at 7am, and get 3 hours of sleep uninterrupted i guess sleeping in your car? lol.....you are gonna DIE or cause a horrible accident if you only get the amount...why can't u sleep from 7am until afternoon? who is watching ur baby when you are working? hopefully you arent leaving him at home alone sleeping? need more details...but a person needs at least 6 hours of sleep or they will poop out very quick