What Causes Vaginal Bleeding Post Hysterectomy?

had ileostomy at 66 , started blood discharge. dr said from uterus after , I told him it comes from vagina looked with mirror6 years lining showed signs of that could cause cancer, had hysterectomy, still discharge, gynocoligist checked with q tip said no blood in vagina,i said I watch it come out after shower with mirror ask urologist, anything I that fied would cause that she sai no, vagina discharge slowed down since hysterectomy, but continue to see in the bottom of tolit when I urineate blood is red age 74