:( I hope that she's feeling better soon!! We've been sick here too- not the stomach bug, but colds and such. My youngest son has an ear infection and sinus infection. I know what you mean about worrying about the weight- he is 7 yrs old and weighs 45 lbs. He isn't a picky eater, but he eats SO SO SO S L O W, and recently has had an issue with chewing his food forever- he had a choking scare (wasn't really choking, but it was close enough to scare him) and so now he is afraid of not chewing his food enough. Last night during his bath I could count the ribs, too!
I hope that DD feels better soon, and good luck on the stuttering. I've heard of lots of kids going through a phase where they do that for a while.