Diflucan for yeast infection?

Claire
So I called my doctor about an yeast infection several weeks ago. The nurse that she would call me in Diflucan, which she said was safe, but I felt uncomfortable taking prescription medicine when I haven't tried anything else. 
I waited for several weeks, it didn't go away despite having probiotics and yogurt almost every day, so I called my Doctor and asked her again to call in Diflucan to my pharmacy. I pick it up from the pharmacy and took it last night.
I realize today that it's a class C drug. Nothing to do about it now, but I feel like I should be very careful about everything my doctor says. What do you guys think?