See gynecologist. I recommend seeing your gynecologist.
Discharge. You need to be seen and examined if you have never had this discharge before.
Go see the MD. You need to know why you are having the brown discharge ie infection, bleeding, a problem in the uterus. This can be figured out during an office visit.
Being Female. Nothing. Many women do not have much discharge or only have this on occasion. What is concerning about this for you?
Other symptoms? If you do not have other symptoms such has an odor, itching, burning, or irritation, this may just be normal vaginal secretions. If you are having other symptoms, see your PCP, gynecologist, or an urgent care clinic for testing to diagnose the problem. Hope this helps.