If I put some yogart on my finfer and insert it in my vagina would that help a yeast infection?

Probably. There is some good evidence that lactobacillus acidophilus, which is the bacteria that is used to ferment yogurt, is effective for vaginal yeast infections. Make sure that your yogurt contains l. Acidophilus, and that it does not contain added sugars, which feed the yeast. If your symptoms don't go away, or if you are not sure whether you have a yeast infection, see a doctor to get it checked out!