I just have norovirus or something but it has been going on for 5 days now with no signs of abating. I'm sleeping most of the time, when not vomiting or having diarrhoea. I've slept approx. 20 hours out of the past 24 and I'm still exhausted. Just sitting up is an effort. No pain apart from diarrhoea cramps and burning in my stomach when I drink anything.