Hi, The possible causes of spotting in your case are: - Minor abrasions due to intercourse can lead to spotting, which when mixed with vaginal discharge can present as brownish discharge. - While using pills some amount of menstrual irregularities can be seen in the form of irregular spotting due to hormonal imbalance. - Missing the pill or altering the time of intake of pills can also lead to spotting. - Local causes like cervical erosion can present with post coital spotting. Usually minimal spotting will possibly subside soon and may not need any treatment. If the brownish discharge persists, better consult your Gynecologist once, get examined and go for pap smear once. With this workup the possible cause of the problem can be identified and treatment can be taken accordingly. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Sree Gouri S. R., OBGYN