"i think mirena is a bit of a hit or miss based on comments and personal experience. i had the cooper iud for 10 years - no problems and no periods. then switched to mirena at doctor&#039;s suggestion. no problems with insertion followed by no periods or side effects. when 5 years were up on 2-6-15, i had a new one replaced the same day as old one removed. i still have no periods, but the insertion of this one was excruciating. i broke out in a cold sweat when i tried to get up and had to lie back down another 15 minutes, even after lying there about 15 minutes initially.now, daily headaches and extreme moodiness. first time, i&#039;d rate 10. this time, not happy. i&#039;m having it removed 4-10-15-will report later if this helps side effects."