How Can A Pouch In The Labia Minor Be Treated?

hi i am 18 years old. theres like a pouch hanging from my vagina next to the labia minor, it does not hurt or itch or cause me any discomfort. i dont know what to do, i am not a virgin but i have not been sexually active in a year. my period has been acting weird and i still have not recieved it. does anyone know what this pouch hanging thing might be?