My stomach has been upset for a couple of weeks. Queasiness, bloating, gas, belching, incomplete bowel movements, lack of appetite. In about 10 days I am facing a glaucoma/cataract surgery, and the other eye 2 weeks later. I'm wondering if I just have a nervous stomach. I do feel rather nervous about the whole thing because this is something new for me. I have taken medication for anxiety as needed.