Cerazette Pill – Bleeding

Patient: The nurse put me on Cerazette which I have been taking this for two weeks now I started taking it the 2nd day of my period Since taking it I havent stopped bleeding its not heavy but dark in colour I also have had a slight dull headache for the past two days but I do have a stressful life Should I stop taking the pill Or does it take a while to settle into the body?