"i had a mirena inserted two days ago, and it was the worst pain i&#039;ve ever experienced in my life. i&#039;m 23, with no children and never cramp, which probably had a lot to do with the pain. the insertion itself hurt a lot, but the cramping that came afterwards was absolutely excruciating. my pulse dropped so low they had to put me on an i.v. my doctor said i was the worst reaction she&#039;s had to a mirena, and she&#039;s been inserting them for years. i was given a shot of gravol, a vimovo and a tramadol. once i was able to leave, i went home and napped for a few hours, and then i felt fine. two days later i have slight cramping (i&#039;ve been taking vimovo) and very light bleeding. hoping it was worth the pain..."