So every two to three weeks I'm getting really ill. I'm vomiting, feeling I'll, achey with a temperature. Very bad nausea and diarrhoea. But only for about 3 days - then recovering. Stool tested negative for bacteria. Just did faecal calprotectin at a time when I had no symptoms and it was 500... But all my scans and scopes are normal. I don't know what to do.... Can anyone help?