DS came back from a school residential on Friday unwell with cough and sore throat. By Saturday he had the most awful diarrhoea most of the day and was finally very very sick in the evening. Yesterday he seemed much better - no diarrhoea or sickness so thought it was just a 24 hour thing. Then today diarrhoea was back with avengence and this afternoon he was violently sick again. Seems really weird that he got better then worse again - I have never experienced this before. Has anyone else had similar?