Magazines, my brain was too addled for concentrating on plots.
Big knickers (or disposables) and towels.
Spare nightie, always felt better after a shower.
Ditto make up.
Tissues for those hormonal days .
Get someone to bring in some nice food, my dh brought me M&S goodies every day, fruit and salads etc, smoothies, hospital food smelt far too bad to even taste.
When are you booked in?