Don't know where you live but you can generally get it from a pharmacy in the US. You don't need a prescription, just ask the pharmacist. I use it to make my own ant bait. Last time they didn't have it in stock but they ordered it for me.

I was going to say, make sure your blood sugar is staying lowish, like 140 or under when you eat. Otherwise your yeast infection might be a symptom of diabetes.