Leucorrhea of adolescent secretion ...

This means that you are sexually mature. You must have made it with your hands or other tools. Frankly speaking, you may have masturbated, because many girls who have been checked in the hospital have masturbated, and some have left something to check. I suggest you pay more attention to the hygiene of the lower body, use some ladies' care liquid, and if you have sexual impulses again, you can go to the sexual health center to buy regular sexual products, but don't overuse them and pay attention to disinfection.