This is JMO, and not based on any fact of any type, but I'm assuming that Dana would of either been off work, or going in for a later shift. I base this on the fact that she had just worked a double shift, and on the assumption that she was still up at 2:30 am posting a new photo on social media. I realize that someone else (the killer) could of posted the photo on social media, if they knew her password, or if she didn't sign off, but at this point it appears that she was still awake at 2:30 or so, so I really doubt she was going to go to work at 8 am after pulling a double.Hunter hearing shots is not MSM and cannot be discussed or speculated on.
CRjr stated in some comments on his FB page that he was homeschooled. Even if he wasn't, plenty of kids don't go to school everyday or skip or whatever, so we don't know for fact he would be up getting ready if he was attending public school or homeschool.
We can assume Dana would be working at 8 the next day, but we don't know that. And if she had worked a double the day before and worked close to home, maybe she intended to sleep in a bit more than usual that day and do the "roll out of bed and go to work" bit.
Typically newborns are up every 2 hours, but not always. Perhaps HR was awake and had a gun to her head and was pleading for her and her child's life.
Really, anything is possible.