What Causes Burning Sensation And Itching In The Vagina?

hi iv got a really irritated vagina and the symptoms are itchy (not insanely itchy but a tiny bit itchy), kindv burning feeling and its very moist with whiteish, dishcharge and im really worried... iv had it for about 4 days now. do u have any clue wat it is? and yes im sexually active but me and my bf where both virgins so its not a sexually transmitted disease. please help.