Can ibs flare ups be triggered by a bug? My diets not been the best lately and a week ago I woke up with cramping and had to rush to the loo. Ever since then I’ve had a lot of bloating and gas. Strangely though, the cramping and loose stool only happened that once and my stools since have been normal. I really don’t want to go back to my doctor been too many times as it is.