My 4 year old ds is in agony. He has had a bug for a about 6 days now, he's just got a temperature but has been on the up. Then about half an hour ago he went really pale and rushed for the loo. He had bad diarrhoea. Then was lying on the sofa with me, and suddenly shouted at me for being too close, made me turn off tv and just not talk. I get like this when I'm in pain, don't like people being near me so I know he's not being a brat. He started sobbing uncontrollably, walked to go to the toilet and has he did projectile vomited all over the floor. All his food came up and then he was happy again, told me it felt like his stomach was burning. He also said when the sick came up it was burning his nose and throat. He keeps having phases of being in pain, and is gagging but no sick is coming up. Do I go to hospital? Any idea what this is?.