spotting is it normal

Im 5weeks palang po, and Im taking duphaston 2 days palang ako nakakapag take, and for 2weeks ko sya iinumin. and then kagabi bigla nagkaroon ng super dark brown yung panty ko pero bahid lang naman sya. is it normal po ba? o need ko na ulit pa consult august 9 pa kasi ako babalik.