Vaginal itching

Okay so I really need help. My vagina has been itching like crazy for about a week and a half. It has itched so bad I've dug raw spots on it. It's not inside or anything, just around the outside of it up in to my butt crack. I'm going to see a doctor tomorrow, because I'm also eat alive with poison ivy at the moment BUT the vaginal itching started way before the poison ivy. Can someone help me to get an idea of what may be causing this miserable itching?