Itching badly

Hi this might be tmi but i need help, my downstairs has been itching like crazy and its got a pungent smell, it doesnt hurt when i pee or anything only if ive itched a bit hard. Its just the labia that itches, my discharge is white no other colour and im wondering whether its something serious or if im able to do something to help it stop? (virgin, i have only masturbated with myself)