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The pelvic discomfort/soreness along with brown discharge could suggest possibilities of infection, endometritis, endometrial hyperplasia, hormonal changes, PID, PCOS, cervical erosion/dysplasia, pre-cancerous/cancerous changes etc. Visit your doctor/gynecologist for further evaluation and assistance. Consider visiting your doctor/gynecologist at the earliest for thorough examination and further evaluation (vaginal swab/smear test to identify causative agent, repeat PAP smear) to look for the underlying cause. Get started on treatment as indicated by examination findings and investigation results. Avoid vaginal douching, use of harsh soap or perfumes in the area. Use loose cotton undergarments and avoid use of tight fitting clothes. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle. If infective cause is detected, and if you are sexually active, get your partner also treated simultaneously, and avoid having intercourse while being on treatment to prevent chances of re-infection.
Take care.