She has been ill for a week, was told by the doctor on Saturday that she should be getting better soon, and today has just been so subdues, hardly eaten anything, has drunk water off and on, but has now gone to bed (at 3.30 pm) and is still asleep. Should I just leave her to wake up from thirst? She is normally so perky, almost never ill apart from colds, so I am a bit of a novice with sick kids. Thanks.