What Causes Itching All Over The Vulva And Vagina?

hi i am a 24 year old girl and have had sex only with my boyfriend of 3 years, recently i started getting itching all over the vulva and vagina,a white semi solid slimy discharge,sometimes pink in colour and white creamy spots over the clitoris,vagina and urethra,i am overweight,i tried keeping the area clean,it gives releif but not for long.sometimes i get a watery white discharge and it smells bad, like raw egg,or stale bread...what do i have,plz advice?