I recently had the injection (Depo Provera) and my period is light / heavy / ongoing / breakthrough bleeding. Why is this?

A lot of women experience changes in their cycle when they first get the injection. Your period is likely to stop altogether if you use the injection long enough but the time varies from person to person. If the bleeding is a problem, return to the doctor to discuss your concerns, possible treatment for the bleeding and check whether there may be another reason for the bleeding such as an infection. Regardless of the bleeding , you are protected from pregnancy for the 12 weeks that Depo Provera lasts.