Re: Persistent white tongue for the last three months, tested negative for HIV
That coating on your tongue and the toothmarks indicate dampness in your digestive system.
You can try the garlic, but don't take garlic for too long because it is a drug-type medicine and will weaken your body if you take it for too long. (there are research studies showing it boosting testosterone with short-term use, but lowering it with long-term use).
Your best bet is to address your diet. Below are a few recommendations, if you need more info, feel free to PM me.
You should cook your food with plenty of fresh ginger. This will help your digestion. It is best to avoid too much of the sweet flavor, so limit the breads and any concentrated sweetners.
Asparagus is mildly diuretic and will help to eliminate some of the accumulated water (which is evidenced by the toothmarks). Alternately, you can boil up some corn silk and either drink it as a tea or use it as the base of a soup if you feel like you need something more powerful.