Phone and charger. Bra and nursing pads.
Blanket ofcourse and snow suit if that is needed
Honestly everything you will need will be more for you. Hospital provides diapers, wash, powder, pacifier, formula if that's what you are doing while baby is there. You could pack the pictures outfit and home outfit. Then a diaper or two for ride home, bottle of water/formula again if that is what u are going to do. Burp rag and that's about it. For yourself your favorite pads, tho they provide some larger ones for the heavy bleeding. Nice loose fitting clothes for yourself. Good luck