Usually around the beginning and after my period is done I notice that I have a brownish like discharge. At first I was kinda worried but then my dr told me it was just the blood getting ready to start and at the end its just the left over blood. I use to never have it and it just came one day..Ive been on bc for about 5 years now and this is the first year that I have had it. But I was told it was nothing to be alarmed about.