It's been a long time since my son was a toddler but I can still remember the fear whenever he would get sick. Heck, he got a nasty virus this past February and I was scared witless! As long as she isn't vomiting and/or doesn't have diarrhea, I would watch her closely but try not to be too worried. At least she isn't dehydrated. Your pediatrician is on it and, of course, so are you. I'm sorry that she's feeling so poorly and prayers are going up right now that she'll get over this bug and be back to normal ASAP.