What is the cheapest and quickest way to take care of vaginal thrush?

I would recommend... A natural treatment for the prevention of yeast, which is to use plain yogurt, mix it in a douche bottle (buy a douching kit from the store but don"t use the vinegar solution given) with half/half water. Then use this to irrigate the vagina 2-3 times per week. This will increase the vaginal bacteria called lactobacillus, which will help to prevent yeast infections.