I highly doubt you have a yeast
infection because if you had a yeast
infection at 11, your symptoms would have gotten unbearable and caused very very severe symptoms, as yeast can travel deeper than just your vagina if left untreated.
Symptoms of yeast infections usually involve mild to severe itching, redness around the vulva (around the opening of the vagina), and a cottage-cheese like (as in white and chunk) discharge.