What Causes Stinging Sensation In Vagina?

Hello , I'm a 13 year old female , 115 in weight , 5'4 in height , and I have no medical history of any diseases or disorders...(but I do have worms in my intestines)



But for many years now I've been having a painful stinging feeling in my vagina , I don't know whats causing it...My mom and grandma who work in a hospital don't even know whats wrong , I've been to the emergency room a few times , but no results came up..help?