Follow-Up:
I too suffer from this condition and have gone through all of the same remedies you have with no good or lasting results. I have however discovered that for the most part if I avoid eating spicy foods and keep my stomach employed (with a small amount of food in it most of the time) I get relief from the dry, burning and swollen lips / mouth. The worst of it usually comes in the night if I don't have something in my stomach to keep the acids from backing up. The stomach bile / acid is what I believe is causing most of the problem. I haven't explored the posibility that it might be caused from food alergies but if it gets worse and my personal remedies stop working for me I'm going to the Doctor and that might be a good Idea for you anyway. Forget about the "Silly" part of it because you might be getting a sign that it's something more serious.