Following my recent colonoscopy, I saw the consultant yesterday and it seems I have microscopic colitis. I was convinced it would be dismissed as 'just IBS', but no. Thankfully, it is the least serious form of inflammatory bowel disease and is treatable, I am told, with a specific type of corticosteroid. We shall see.
So I guess that makes me an impostor on this forum! With this diagnosis, several other symptoms now make sense too, such as swollen joints and the occasional mouth ulcer.
BW