Should I be home sick?

So on saturday and sunday I felt horrible, I had a fever, diarrhoea, was vomiting, was sore everywhere and had a sore stomach, I could hardly drink water or eat anything but on sunday mum bought me some energy drink which I was able to digest without throwing up. Then on monday I still had a sore stomach and was vomiting everything and was just sore in the joints, on tuesday i felt better, I was sitting up instead of lying in bed. Wednesday I tried to go to school but felt too sick in the morning, Thursday today I only have a stomach ache at the moment but felt nauseated in the morning.I feel fine now that I've eaten a bit. Should I be home sick or should I be at school?