Marilyn,
Just asking if you possibly have been using products with "sugar alcohols" in them? They used to have to put it on the front of the package if it had sugar alcohols in them, and they are changing things that were sweetened with Splenda and putting sugar alcohols in them without notification. One of the products was Good Humor Fudgesicles. Sugar alcohols cause horrific diarrhea, gas, and can cause spastic colon. They are sneaking this stuff in a lot of products today, so check your ingredients to make certain you are not unknowingly getting into sugar alcohols.