I've treated yeast infections using Apple Cider Vinegar (but only Bragg's brand with "the mother" works.) It looks gross with the stuff floating in it, but it's amazing!
You can do one of two things. You can douche with it or make a sitz bath. To douche, I use a cheap plastic 1-use douche container from Walgreens. I dump out the vinegar, rinse it, and then add a tablespoon of ACV and fill the rest with distilled water. It may burn a little bit, but that will be followed by relief! This is what I normally use, and I use it 2 times a day and the yeast infection is usually gone in a day or two.
To make a sitz bath, fill the tub with warm water just a few inches to cover your hoo ha. Add a few cups of ACV and soak yourself.
I've also used acidophillus pills and yogurt. The quickest method is the ACV.
Good luck!