How Long Will My Bleeding Continue While Taking Dronis, Given My Prolonged Spotting And Recent Period?

Hi, I am suffering from prolonged period like spotting more than 3 months, I have taken primolut n 3 times for 1 month, then stop, now its 5th day of my normal period bleeding, doctor suggest me to take dronis 30 from 5th day, 1 tablet I have taken yesterday now still small amount of bleeding continues, when will my bleeding completely stop during taking dronis 30, please suggest?