A.B.
This is one of the hardest things to go thru! My 2nd and 3rd babies were each in the NICU for 3 weeks after they were born because of being preemie. You do feel guilty for not being with the other child no matter where you are at. My comfort came in knowing that my baby was in great hands in the hospital and wouldn't remember me being gone for a little while, but my older child would. I spent most of my time at home, but spent quite a bit of time at the hospital with my baby.
Believe it or not, but you'll feel lost once baby comes home because you get used to the hospital life real quick. It's a nice feeling knowing you don't have to go back and forth anymore!