Hello and welcome,
I understand the issue. A few women may continue to experience irregular bleeding for a few months after
mirena. Later most [ not all] will experience absent or scanty periods. The
backache is also due to the coil and it takes again a few months to get adjusted to it.
However if the bleeding is severe and the pain is also severe, it is better to see your doctor to check if the coil is in place and also to see if there is an infection or some other cause leading to pain.
Hope this satisfies your query.
Thanks for using HCM.
Feel free to ask any more questions that you may have.
Dr Madhuri Bagde
Consultant Obstetrician and Gynecologist