Not to worry...I have seen garlic turn many colors...in my travels as chef...
Garlic Can Turn Blue
Raw garlic contains an enzyme that if not inactivated by heating reacts with sulfur (in the garlic) and copper (from water or utensils) to form blue copper sulfate. The garlic is still safe to eat.
Garlic can turn Green
If the garlic was not fully mature or dry, pigments in the garlic may turn green when in the presence of acid. Garlic will also turn green (develop chlorophyll) if exposed to an temperature change or is exposed to sunlight. Some people say it can be stored for 32 days at or above 70 - 80° F to prevent greening, but I'm not yet sure that is true. Green garlic is safe to eat.
so, if your vagina was warm or acidic (maybe you also used yogurt or vinegar wash as a cure? both are acidic) it could easily turn the garlic green, but not to worry, its still good to eat (LOL)