Dark brownish-blackish discharge

Hi mga mommies, first pregnancy ko ito, im on my 6th week based on my utz, but my last mens was January 5, i had this discharge since February 28, and my OB gave me duphaston. 3x a day. Sino po sainyo nakaranas ng ganito? Medyo kinakabahan na kasi akk eh. Thanks po #1stimemom #advicepls #firstbaby