I don't understand why...

I don't understand why I have thrush right now. I have been sticking to what I have been told and I am not even on antibiotics. GRRR! I eat yogurt with the good cultures in it, am NOT on antibiotics right now, and have been taking probiotics, plus I have stayed away from sick people. GRRR!

Sorry...just had to vent! I am at a loss for words/answers to why I have this right now! Okay vent over!