So I went on a bike ride and I went over this bump. When I got home I realized this piece if skin that has almost fell on my vagina. I guess it just dropped. I did some research and I m guessing it s the hymen. I have been putting polysporn on because lately my vagina has been itchy and kind of burning after I go pee. I am 12 years old. Should I be worried and consult a doctor. And I have not yet gotten my period.