I was just wondering if the noro affect on your lower intestines (bowels) come on quickly? Or do you bowel movements like slowly get worse until it eventually leads to d*.I get worried if my bowels are a little looser than normal (not d*) and it usually makes me worry for the rest of the day. If I knew that it just hit you suddenly I probably wouldnt be worried as often. So does it come on quickly or lead into d*?