Hello,
In this circumstance, I suggest you to undergo one
blood test for beta-hCG and TVS scan to rule out possible conception. Brown discharge is commonly associated with
implantation bleeding or early sign of
miscarriage.
Other reasons are vaginal or
pelvic infection, old endometrial tissue with clots, hormonal imbalance etc.
Please consult with your gynecologist following above test reports. Maintain genital hygiene properly. Good luck.