What Causes Redness, Itching And Soreness Inside Vagina?

Hi, may I answer your health queries right now ? Please type your query here...Hello I am red inside my vagina and it's sore and very itchy. Alot of yellow discharge is coming out too. Iv had this for nearly a week now and am sexually active with my husband. What can it be? What can I use to make it go away? Thanks