I think your babies are just fine on your crazy schedule
My fiancee goes back and forth from day to midnight shift and that means I end up on his shift too
My guys sleep when we sleep and they never seem bothered by the switching. Oh and they won't get up until we're up
Heck, Miss Pia will stretch and stare at me like I'm nuts if she's still tired. I have to literally carry her around for a few
Anyways, I think your little ones are just fine
