What Causes An Itching & Burning Sensation On The Vagina?

I went to planned parenthood after a month of itching and burning on my vagina. They said it wasn t yeast but want me to go for a biopsy. apparently the ulcerations have white skin all around it I took a peak and it s scary, no wonder I m in pain. Should I be worried? Biopsy just seems to have bad news follow it.