Congratulations.
Like the others said,you're just tired.Make the most of your man while he's home,rest as much as you can.Nice to have a man who hears the baby.Nothing wakes mine
Audrey's right,it does your baby no harm to cry a little.I'm sure a few moments longer you'd have woken anyway.
Just like it's an instinct to wake up when your baby cries...it's also an instinct for your body to rest. So, all it is, as the others have said, is you being tired and your body absolutely doing the right thing and sleeping deeply. You're obviously in touch with what your own body needs....and now you're more rested for those night time wake ups!
Congratulations on your baby girl.