Yeast infection pill

I'm 15 weeks 4 days pregnant and I have a yeast infection. My doctor prescribed me fluconazole 150mg... it's a one time pill that's supposed to help clear it up. I looked it up online and I'm not sure I want to take it. 150mg is shown to be a Category C, while higher doses are Category D. I trust my doctor, maybe I'm just paranoid, I don't know.

Have any of you taken it during pregnancy? Are there any other, more natural ways to get rid of the infection? Any help/info would be great!