It's definitely the Mirena. Many women have written in about abdominal pain and back pain. This can definitely be due to the toxins in the liver and gall bladder being unable to cleanse or causing gallstones. For me I had terrible insomnia with severe pain between my shoulder blades (which is gallbladder). Gallbladder/liver issues can lead to many of the side effects women are suffering from with the mirena: hormone issues, gas/bloating, weightgain, issues with insulin/blood sugar/hypoglycemia, thyroid, insomnia...It seems so obvious now to me that the Mirena was a toxin to my body. If this toxin is not able to be cleansed by the liver it can then cause issues with the heart, nervous system, kidneys, spleen...GET IT OUT!