Hi, I understand your concern. Brown discharge in 5th month of pregnancy can be due to - Causes from inside of uterus- ( placenta previa/ placental separation due to blow,trauma,fall on abdomen,bleeding due to high blood pressure) - Causes due to infection/inflammation/polyp in vagina or cervix. Usually cause of discharge is found out by detailed examination/ investigations like sonography, vaginal swab testing.Treatment is decided after the diagnosis. Your doctor has given you Grbnivion & efaston ( to help maintenance of pregnancy),Spadix to control cramps. You should take rest along with the medicines & check back with your for need of any antibiotics/ anti trichomonal drugs. Thanks.