Im 16, Never Had Sex, But For Years (since Middle

Im 16, never had sex, but for years (since middle school) i would scratch my vagina so bad it bleeds A LOT. I try not to scratch it but it feels so good almost like the feeling people get when they cut themselves, for the short time you do it it feels good. There have been many times where it bleeds so much i cant get up/walk it hurts so bad. Ive had yeast infections before but im pretty sure this is something different, I think it might be because when im done using the bathroom i rub and not wipe which causes the innitial irritation? What do you think/what should i do?