My Period Is Almost 3 Weeks Late. With A Very Little Brown Discharge. What Could This Be?

Delay in periods can be due pregnancy, depression, anxiety, polycystic ovarian disease, hormonal imbalance, use of hormonal medicines including hormonal birth control methods, thyroid problems, pituitary problems etc. Brown/dark color of the periods is usually due to old blood and usually occur in those ladies who have delayed periods. In my opinion, you should get pregnancy test first if you are sexually active and if the test is negative then visit a doctor for proper diagnosis and treatment of your problem.