Oh, it's been awful. For us it began with DS on Wednesday while I was making dinner. He puked then kept puking every 20 min or so 'till we got him to sleep around 10:30 that night. Poor kid kept puking the next day then it turned to diarrhea. I came down next and then DD. DH was last and his was the most mild.
Now we are actually on round two of illness again begun with DS. This time we are all getting some kind of rhino-virus. Sucky!!!!!!!
You question about what to do for her...you're doing it. Cut out all the solids 'till her appetite really comes back, nurse her when she's willing. I keep a towel on the floor so that if vomit begins we just go to floor where I can help DS got to all 4s. DD knows to do that now. It's a lot easier to pick up a vomit towel than clean it from hardwood or carpet :-/