Flip flops flip flops flips flops. Essential. I wore them in the shower as well as around the ward.
I would never have thought I would need one but I actually asked DH to bing me a notebook and pen after DD1 was born (was in a mw led unit for a few days trying to get bf sorted) as was so tired could never remember when I'd last fed her, from which boob or for how long, only way to do it was to write it down, but that prob wouldn't apply if you're planning on going straight home.
2 nighties for you, plus some sort of dressinggown/robe, prob all summer weight as it's roasting in there and noone warned me about the post birth night sweats in the nights after DD was born, which are massively magnified by the plastic sheeting on the beds....
Otherwise, phone and charger, make up, contact lenses, hairbursh, dry shampoo (invention sent by god to new mothers) and nice smellies so you have at least a fighting chance of feeling at least semi human.
Would also say to take mat towels rather than normal pads as the mat towels aren't plastic backed like the normal ones so you're a little better "ventilated" (
?!?) and therefore less likely to get thrush. NOT pleasant with stitches... Also the mw's may want to monitor your loss and they can't do that so well with normal pads. I got 2 packs of 5 enormous pants from matalan (buy black NOT white!) for £2.50 per pack. Perfect.
Good luck!