ds1 had his out last year when he was 4. he was pretty sore for about a week afterwards and really didn't eat much at all. he had lots of lemonade and a few mouthfuls of yoghurt and ice cream, but he really didn't want much at all.
when you get her home, you really need to stay on top of the pain killers. keep strictly to the schedule and don't wait until she seems like she's in pain to give it to her iykwim? because by then it's probably too late. hopefully you will get a morphine based pain killer to take home- this was our saving grace and really allowed him to get lots of sleep and recuperate well.
i was really nervous too, but he has been so healthy since the operation. he has put on heaps of weight and has barely been sick at all. it was definitely well worth it.