I suspect your [apparent] two day fast [along with your other bodily eliminations, six months ago] is why your tongue cleared.
Fasting, calorie restriction, and/or an all raw diet, e.g. fruits and vegetables, can certainly help [and most probably cure] your health malady, but all of those remedies are quite upsetting to most people's daily lives.
If you are interested in another possible approach that I have found very health promoting/maintaning, the following information may be of interest to you:
As "grist for YOUR mill," are you aware of the almost miraculous results many tens (hundreds?) of THOUSANDS of people have experienced, dealing with MOST of the physical health issues known to humankind, from ingesting the universally powerful ANTIOXIDANT, ascorbic acid?
If you are seriously interested in finding a solution to your health problem(s), and gaining better health in ALL areas of your body, I encourage you to read [at least the first ten paragraphs of] this article, written by Dr. Robert Cathcart, M.D. http://vitamincfoundation.org/www.orthomed.com/titrate.htm
It may just solve some or all of your health issue(s). You have only better health and well-being to gain by applying its recommendation. What have you got to lose?
These three quotes are very instructive:
"There are more than ten thousand scientific papers that make it quite clear that there is not one body process (such as what goes on inside cells or tissues) and not one disease or syndrome (from the common cold to leprosy) that is not influenced - directly or indirectly - by vitamin C." -- Dr. Emanuel Cheraskin, M.D., Dr. Marshall Ringsdorf, D.M.D., and Dr. Emily Sisley, THE VITAMIN C CONNECTION.
"The evidence unequivocally shows that mega-gram doses of vitamin C can prevent and cure a vast list of conditions that plague mankind. It is both inexpensive and completely safe. My conclusion: vitamin C is THE 'Primal Panacea.'" -- Dr. Thomas E. Levy, M.D.
“I have NEVER seen a patient that Vitamin C would not benefit.” -- Dr. Frederick Klenner, M.D.
I wish you BEST success, Pablo, in your search for better health!