What Does Increased Vaginal Bleeding After Having Primolut Indicate?

Hi, I got sunscribed Primolut because I have had non stop bleeding since getting the contraceptive injection and i want to STOP the bleeding. But since taking Primolut, i have had increased heavy bleeding and pain. I have taken on pill a day as advised, for the last 6 days and have had no signs of my period stopping. Is this the right medicine to take?