It is very common to experience brown discharge about a week after taking the i-pill (levonorgestrel). This emergency contraceptive contains a high dose of hormones that temporarily alter your menstrual cycle. The brown discharge is typically just old blood being shed from your uterus as your hormone levels adjust, and it is a normal, expected side effect. Try not to worry. However, if you experience severe pelvic pain, very heavy bleeding, or if your next period is delayed by more than a week, it is always a good idea to take a home pregnancy test or consult a healthcare professional just to be safe.