I've had the Mirena for three weeks now, and I believe I started my period about about the same time, but my period or bleeding has not stopped since I've started the Mirena, and it's been fairly heavy as well, not soaking the pads, but having needing to change it often. Cramping has been off an on. My doctor told me that there is really no telling how the body will get used to the Mirena and that it may take a couple months to get used to, or that I may always have cramping.

How has your body reacted to the Mirena when you first inserted it, and how long did it take for your body to get used to it?

Thanks.