My husband and I keep a very strict gluten-free diet.
One problem is that gluten testing is frequently inaccurate. Blood tests like IgA anti-transglutaminase or anti-endomysial antibodies may come back negative, and many doctors say if your GI symptoms are not severe, then don't bother avoiding gluten. Gluten's in salad dressings, soy sauce, muffins, bread, pizza, pretty much everything. Gluten acts like glue in regular flour.
Up to 75 percent of people with persistent symptoms improve after going gluten free. If you feel better, don't reintroduce gluten again.