My sleep schedules varies, mainly due to meds and if I am having a bipolar mood episode. As long as my daughter has what she needs, I don't feel guilty on what time I wake up. She's older, now, so does fine if I'm asleep. She knows to wake me if it's important. If anything, the more sleep I get, the better.

I don't really believe in "shoulds"...if your body needs rest and your schedule permits it, I say sleep in!