About 3 months ago I had an Abortion done...

... My first period after procedure was in october, I had an extremely heavy period for almost a week. About two weeks ago, I was supposed to start my period again but instead I began to have brownish discharge (sometimes dark, sometimes light in color). Last week I would pass dark red blood clots but then back to brown. Now I still have the brown discharge. It is accompained by light but uncomfortable pain/cramping. Everytime I feel pain and cramping I have discharge following it. I am going to my doc on thursday but would like to know what this could be????? I'm getting worried.
