I am 64, do not smoke or drink, no stomach pain, etc., got up from bed yesterday morning and as soon as I stood up I had diarrhea. Same thing this morning. As soon as I stood up from bed I soiled my underwear. Never had this happen before. No blood in stools, I do have gallstones and acid reflux, but no pains of any kind. What to do besides wearing a diaper to bed???