How To Cure Greenish Vaginal Discharge?

Hi. I have a question about my discharge. I am 11 years old and my discharge is yellowish and slightly greeny. It is kind of rough after it dries. I heard that discharges are supposed to be white but mine is yellowish and greeny. So my question also is, is this normal and how can it be converted back into its original color? Please help! I am worried!