You do not need to pack much for the hospital.
medications you now take daily, the only ones I used were for my breathing however.
A robe, for hall walking, non-slip slippers, but the hospital will give you those sock things
wear comfy clothes to the hospital so you have them to go home in. (sweats)
hair brush, toothpaste/brush
a magazine - chances are though you won't ever get it open. You'll be drugged, getting up to walk and have guest and sleeping.
Good Luck & God Bless you in your journey!