My experience with Mirena was fantastic for 2 years. Then I started to get my period again. They can now last for up to 2 weeks. I called Minera and they have not heard of this, I saw my OB and the ultrasound was normal, I'm not pregnant and Mirena was in place. I have no infections, cancer, nothing. Yet the bleeding continues mysteriously after 2 years of virtually nothing. I feel fine, my check up went well. Has anyone ever heard of this?