Grapefruit seed extract is the one natural remedy I was most impressed with. Use it for one week then switch to another such as oregano oil for one week. The go back to the GSE. and so on. You have to rotate because the yeast will get used to one if you use it longer.
Grape seed extract is one thing people often mistake for Grapefruit Seed Extract (GSE). They are not the same. You want GSE.
Raw garlic chopped fine is another antifungal and cheap, too, though not as initially strong as GSE. You can put it in salads or other foods after they're cooked. Some people just put it on a spoon (chopped) and swallow with water.
Olive leaf and cinnamon are also known as yeast fighters, though very mild.
Raw virgin coconut oil is a yeast fighter as it has caprylic acid in it. You can also buy caprylic acid in capsules and this will be much stronger than what is found in coconut oil.