Is this normal? Does this go away once the intestines heal? Is anyone else having this struggle?
Once your intestines completely heal, you should be able to digest sucrose. The enzyme sucrase, which is needed to digest sucrose, is located in the center of the villi in the small intestine. When your villi are damaged because of injesting gluten, then you may have a problem digesting sucrose. Without the enyme sucrase, sucrose goes through the digestive tract, undigested, and causes gas, nausea, diarrhea, bloating, and pain. (Not all celiacs will have this problem, it just depends on the extent of villi damage).
If you had extensive villi damage (meaning the villi may have been completely flattened), then it may be a few more months until you can digest sucrose again.
I read this info in Wheat-Free Worry-Free The Art of Happy, Healthy, Gluten-Free Living by Danna Korn pgs, 309-310.