MY baby was just spayed Thrusday and I've been carrying her around ever since. Since they are not allowed to jump, run and so on for at least a week, keeping them very still causes them to be a bit chilly, so I suggest some soft clothes like jammies or fleece shirts. If you have a sling, that would be the way to go if she won't stay quiet in her crate or expen. Razael does the jumping jacks, so I have to carry her. If you don't have a sling, you can take a T-shirt that's too small for you and cut it in half right under the sleeves and use the bottom half to drape over one shoulder.
She probably won't each much at all due to not getting exercise. My baby isn't eating hardly anything, but she's still ok. I just put her in her expen long enough for her to potty on the pads and to eat. When I'm on the computer, she lays on a little blanket on my lap and gets to chew on something special. We also cuddle with her in the evenings when we are watching TV.
When I took her in on Thursday morning at 8:00 am, I came home and tore this house apart cleaning, moping, vacuuming, bathing Zada and Azrael and it sure helped me get thru the day without too much worry.
You will do fine and so will she.
