Brown vaginal discharge while breastfeeding and also i'm sexual active.

Brown = old blood: Irregular periods are one of the most common problems obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. Infections & hormonal changes can cause spotting. Brown simply indicates old blood and is normal. There are many options available to help regulate the menstrual cycle. Schedule a visit.

Brown: Its likely old bloody discharge, however it could also be infection or blood from a new pregnancy. Breastfeeding only acts like birth control for a month or so. Check a pregnancy test and if the brown discharge has an odor or gets worse see your health care provider