I wish I had stock in the company I mention it so often. Jarrow makes a probiotic that is specific for vaginal balance called Fem-dophilus http://www.jarrow.com/product-391
This is a formulation from 10 years of study by a Dr. researchers Dr. Gregor Reid and Dr. Andrew Bruce. There are a few other companies that now make a vaginal health probiotic as well. You might try these and see if after a trial period they make a difference for you. I personally do not believe in the "science" of homeopathy so would not have confidence in them being helpful to prevent yeast infections.