Yogurt is good for prevention of yeast on a day to day basis but you need a more potent way to avoid it during a round of antibiotics. Go to the local health store and get a probiotic in pill form. It will prevent it next time. Right now you need something even stronger. Tanalbit by Intensive Nutrition will rid your entire body of yeast within 3 months if you take it regularly. Yeast, when it shows itself in the vaginal canal or in the mouth (as thrush) then your entire body is already eaten up with it. It can be a major undertaking to manage it because you have to remove all types of sugar from your diet.
Yeast is talked about like it is fairly minor but it can be a precursor to so many major diseases because it breaks your immune system down so quickly. If you have any questions about what I said, please PM me and ask.