I have periodic episodes of constipation which if not relieved turn into severe cramping (writhing on the floor) with projectile vomitimg at the same time which can last up to a hour. It’s as if my body have decided to eliminate everything internally all at once. Afterwards there is rectal bleeding which goes away in a day or two. This has been happening since 2014 (I am 67) 2 or three times a year. I have changed my diet and lost weight, use Miralax everyday. I once found a name for what this is called but can’t find it again. I am beside myself trying to find a way to stop this from happening. Thank you