I have 3 weeks bleeding like that last days of menstruation, what could it be? i take yaz (drospirenone and ethinyl estradiol) as contraceptive for years. could it be the new roaccutane?

Health changes: Any changes to your routine or health may alter a menstrual cycle. Sometimes stress or a new thyroid condition may change your bleeding pattern. Introducing a new medication to your daily life such as Accutane may also cause these changes. It would be best to be seen by your ob/gyn soon so discuss the managment of your changes in bleeding.