so I'm gonna get weird off the bat but when I masturbate, doesn't matter if I'm on my period or not, once I finish I bleed heavily. I've been on 4 different types of birth control in the past 12 months and for the past 4 months whenever I get super horny or masturbate I'll start bleeding. the bleeding will last from an hour to a week or two. does anyone else have this problem and does anyone know what might be wrong?.. thanks for any feedback ladies.