Hi, I have very dark brown discharge (going to blackish) at the beginning of my period. This has been happening for about two years. I had my pap smear test twice, and also had D&C twice, and what was removed from the uterus lining was sent for test and the results came out okey. For all these 2 years my period was coming earlier and irregularly like 14 days, 21 days, but this month it has started on the 30th day. What does the discharge mean? What does the frequent periods mean?