Thanks for the query. Oral contraceptive pills
can cause side effects like intermenstrual spotting, brownish discharge etc. Nausea
sensation etc can also be experienced with these pills.
If you are having any associated symptoms like vaginal discharge
etc, better to get examined to find out pelvic infection
If there are no signs of infection and the symptoms are due to pills only, you can go for symptomatic treatment.
Possibly the symptoms will subside soon.
If the brown discharge persists, you can go for additional dose of hormones for few days.
This will help in decreasing the spotting.
If the problems increase you can change the contraceptive method with your doctor's advice.