I have a friend that swears by live culture unsweetened yogurt.
Make sure its live culture. It means that it contains Lactobacillus Acidophilus which keeps Candida in check. Candida is the yeast in yeast infection.
Candida loves sugar so it should have no sugar in it (unsweetened). Also make sure it is unflavored. As much as you want to get rid of the yeast smell, strawberries or cherry is not the way to go.
You eat it and apply it to the vagina and vulva.
Hope this helps! I feel itchy for your part just thinking about it.