I have a long history of very large and painful mouth ulcers coupled with low ferritin of less than 5, fatigue and very pale skin. I have been given iron infusions to increase my ferritin levels which are now fine however i still have very painful mouth and xtreme fatigue which i am desperate to cure! I have tested positive for parietal cell antibodies however as my b12 level is 450, the gastroentriloologist I have seen says it must be a false positive. I am very disheartened as I thought that I might be closer to finding some help, however I just keep hitting a dead end. I am trying to convince someon to test me for intrinsic factor antibodies and to refer me for the active b12 test in London but im not holding out much hope! Any advice would be very much appreciated!