You most likely have fructose malabsorption and the bacterial overgrowth that generally comes with it ! The reason sugar/glucose don't cause problems is because they absorb really quickly before reaching your bacterial / fungal overgrowth. If you're a fructose malabsorber, they don't absorb at all, and feed your overgrowth the whole way through the digestive tract (hello bloating).
All those natural sweeteners you listed are very high fructose.