dd (4) woke up this morning with a 39C fever. last week she had a fever and felt nauseous. two weeks ago she had the same for a few days. about a month ago she was vomiting. i am getting quite fed up of it. she loses her appetite for nearly a week every time she feels nauseous or is sick and then she seems to get it all over again. i'm wondering if these are just bugs she picks up at nursery or if it could be anything else.