Yeast infection?

Ana

Hello, I was prescribed metronidazole (pills) for a bacterial infection, and they also gave me one fluconazole pill. I took the fluconazole at the same time as I took day 1 of the metronidazole pills. It’s supposed to stop me from getting a yeast infection from the pills, but I just finished my medication and I think I got a yeast infection still. Is this possible?