Hi there. I had a severe bout of what the locum told me was gastroenteritis. I went to my own doctor when he was back in surgery as it hadn't really cleared. I haven't been given anything to take but had sample stools tested and blood tests. I now have to go for a colonoscopy and am scared witless.. Why didn't the doctor give me something for the diarrhoea. I have lost a bit of weight but nothing drastic. I could do with losing some.