Hello, Welcome and thanks for posting your query to HCM. I can understand your concerns for brown per vaginal discharge. Now there can be many a possibilities regarding this brown discharge including Pelvic Inflammatory Disease (PID), certain sexually transmitted disease and other wise in normal conditions also. But as your discharged is accompanied with sharp penetrating pain in your lower abdomen and near vagina so it is best to consult a gynecologist who can examine you best and then rule out any serious possibility. Avoid any self medications to control your symptoms as can prove dangerous especially in pain part. So meet the gynecologist at the earliest. Hope it helps. Get well soon, Dr Sanjay K Kanodia MD ( Dermatology and STD)