How Should A Vaginal Discharge Despite A Hysterectomy Be Treated?

Hi, I had a total hysterectomy a year and a half ago and I am still having a light pink to red discharge. At first it would only happen after inter coarse, and now it will happen more frequently, when I have a full bladder. I have an appt with my doc in 5 weeks, and can't get in any sooner. Any thoughts what is causing this?