Hey you. I'm 17yrs old and sometimes after sexual intercourse, I bleed for 3-7 days comtinuosly. I don't experience much pain during intercourse and can't seem to find out the problem. I went to the doctor and he told me that itcould be a hormonal imbalance an it could just be that I get my period every 11- 14 days but I doubt it. If it is from sexual intercourse... is this a serious case?