Suggest Treatment For Itching And Swelling In Vagina

Ive been having unprotected sex because im on the pill and im usually sore after sex and red because alot of rubbing and the same thing happened this time but i got itchy and so i started scratching but i accidentally scratched the inside really bad and it hurt so i put warm water on it and it started swelling ALOT like the flabs around the rim and i dont know what to do or think