Yeast infection?

alexandra

I think I have a yeast infection. Initially I thought it was a UTI but my doctor's office said no. Over the last few days I have felt worse down there. I am swollen, have burning and itching in and around my labia and right outside of my vagina. There isn't really an odor at all and my discharge is mainly wet. Is this a yeast infection? I've only ever had like 1 my whole life and I can't remember it's been so long. Which is the best over the counter treatment?? I think my doctor is doing a group b strep test tomorrow, talking monistat wouldn't affect the test would it?