Im scared about myself please help

So since i was about 13 my vagina grew this bump near the outer lips and its like a diamond rounded shape. Im afraid to tell my mom because im extremely insecure and stuff. What do i do? I can grab it but it wont move, its not small but its not that big. Imagine a very small bean, thats how it feels

(Edit)im currently 15 and its still the same size