GIRLS ONLY!!! what causes itching on the outside of the virgina?

Ok im 13 years old i've never had , never kissed any one, and don't shave or have a period. But my private area has been itching lately. Its soooo embaressing! I told my mom about it but she said a natural girl phase. I take baths twice a day but it doesn't help. Could it be yeast infection, is it sign that my time of the month is coming i need answers! Please no mean or imature comments. Thanks!