Sometimes brownish spot may indicate early sign of miscarriage
though mild spotting is quite common in early week of pregnancy.
Duphaston contains dydrogesterone
) and is used to prevent miscarriage (specially threatened type) & support pregnancy (as your embryo too small).
Continue folic acid
supplements, protein rich diet, avoid long journey/heavy work, maintain personal hygiene, take adequate rest and repeat scan after 4wks for detailed feto-placental well being. Do periodic check up and complete suggestive investigations.