When my IBS-D was pretty severe it wouldn't wake me up at night like a stomach bug could, but if I woke up and was awake for long enough to get conscious my gut would wake up too and I'd be headed for the bathroom!So if you're waking up because your body is used to being awake then... I don't think that's IBS waking you up.Re: waking up from dream sleep...that is the time when you are sleeping the lightest and are easiest to wake up.