my 4 yr old has been sick on and off for 3 weeks now, most the day she will be fine then all of a sudden her temp shoots up and she starts vomiting and becomes drowsy and sleeps alot. almost every night for the 3 weeks shes vomited at some stage but last night i heard her crying went to see to her and she was shaking chattering her teeth but laid in a huge sweat patch where she was burning up with a very high fever and body hot to touch it lasted for about an hour she has woke up this morning fine again but i dont expect it to last any advice????????? im extremely worried