When you take anibiotics you kill the good flora along with the bad. Get some accidophalis to replace the good. In the future when you are put on antibiotics take the accidophlis at the same time to prevent the yeast infection. Low carb has nothing to do with yeast infections. Sugar and white flour promote yeast.

If you already have a yeast problem, avoiding fermented foods (such as aged cheese, vinegar, wine and beer) and fungus such as mushrooms for a while would be a good idea. The other thing that yeast absolutely loves is sugar. I never had a yeast infection in my life until my mid-30's when my blood sugars got out of control. Then I was having one a month on average.
I haven't had a yeast infection since I started low carb over 3 years ago.