Approximately 3-4 hours after eating, I had vomiting and explosive diarrhea on Saturday, followed by severe stomach cramps all through the night, Sunday and the cramps remain today, accompanied by bright red bloody mucus..only a small amount each time I go to the restroom. This has happened once before, but as soon as my system seemed to be back on track, the cramps and bloody mucus were no longer present. Is this something I need to have seen about? I have had a colonoscopy, results were normal, all was well.