@leah I didnt go with Mya either and I was also in overnight. I took:
Dressing gown
Slippers
Baby wipes
Deodorant
Clothes for the next day
Post op bra- make sure it’s a black one!
Toothbrush/toothpaste
Hair brush/bobble
And I think that’s pretty much all you’ll need!
There’s a tv in there to keep you entertained. You might want to take a couple of snacks too, but other than that I don’t think you’ll need much more xx