I have a similar problem. I have really bad stomach problems because of my GAD but I also have chronic headaches and fatigue because of my GAD too. So I have to drink coffee to help the headaches and fatigue, but it hurts my stomach so much. I think I am going to start looking in to. I am trying to figure out what to do too. For the stomach problems, I am taking Prilosec and just making sure i take antacids before I drink coffee. Also make sure that you don't get hungry, because that can make your stomach problems worse, so try to eat small frequent meals and don't drink coffee on an empty stomach. I dont know what your stomach problems are, but mine are gastritis and acid reflux caused by my anxiety and this is what my doctor is telling me to do. I would suggest cutting down on coffee, not completely out, but slowly cutting it down. HOPE THIS HELPS!