It's Snack Pack pudding cups. I also discovered that the yogurt I had been eating was made with aspartame. The only artificial sweetener my digestive tract will tolerate is Saccharine. A little Stevia but very little. If I eat too much of that the same thing happens. If I remember right, Stevia is in the same family as golden rod and it's possible to be allergic to it.
I'm not diabetic. I watch my sugar intake to keep my triglyceride levels down so I don't have to take medicine to do it.
But some forms of chronic digestive problems happen due to the artificial sweeteners used in processed foods, especially if you have a fructan intolerance.