ive had a patchy tounge for months now, i went to my doctor who gave me tablets for two weeks for thrush of the mouth which has now made my tounge white and not helped at all, she tested by blood for problems with my kidneys and if i had diabeties, by blood was fine but my tounge seems to be getting worse, it is sometimes sore and i have no idea what to do. On Med Help ive read about Geographic tounge and how B12 helps it. ive been taken them twice and day and it doesnt seem to help. my doctor seems to be very un-usful as well. it looks terrible. any help ?