"i got the kyleena inserted today and experienced the worst cramps in my life. the insertion were (8/10) on the pain scale. i am not very sensitive to pain but can&#039;t take any pain medication. the last 4 hours has been the worst in my entire life so far i have really bad cramps now 10/10 and nausea. i can&#039;t even get out of bed because of the severe pain!"