I dont like this in the description of the proceedure
I have had a lot of surgeries for my foot, Ds has been under once and DD twice.
They can wake right as rain or like hell came for a visit. Its a crap shoot Sounds like you due a right as rain.
You know the worst part of this is Anxiety.
She is young enough she wont even remember in a week. (I know that doesn't help)
Plan for the worst, hope for the best thats all you can do.
Good luck