I am 13 year old girl, and I occasionally masturbate. When I use my fingers, they come out covered in blood/discharge. It's brown, has no odor. This has happened many times before and now I'm seriously concerned. Once before, the blood was bright red and didn't go away for at least 9 days. I am a virgin, I have not had any sexual contact with another person at all. Is this normal, or should I see a doctor?