I would suggest that in parallel with your current treatment you do cleansing.
Check, i have posted two different types.
First I would do castor oil + lemon juice. This will clean/heal the small instestines; flush out mucos (with bacteria and fungies). Asorbtion will improve. google castor oil properties. You repeat it and your tongue will become pink again.
I am using Now Solutions castor oil beacuse it says "food grade" on the bottle. Probably others are ok too. You will have more energy, etc. ( you need it cause you tongue is coated ).
Second. I would go for Dr James Wilson protocol. I took it from his site. His new site does not have it but all remedies are available. the main remedy is based on Colloidal Silver . works well. I have posted it many times, you will find it under my name.
Bottom line: Heal your gut first. Lots of stuff depends on it.