For thrush, make a basil tea and use it as a gargle. Boil 3 1/2 cups water, remove from heat, and add 1 1/4 teaspoons ground basil. Cover and steep for 30 minutes. Cool and gargle. Or sweeten to taste with maple syrup and drink 1 cup twice a day.
To relieve itching and burning, make a tea of rosemary, and use it as a douche or dab it onto the external area. Or make a thyme tea using 1 teaspoon dried thyme per 1 cup boiling water. Steep and drink 1 to 4 cups per day if you have a yeast infection.