"today i went in for my iud mirena insertion, and i have to say it was a bad experience for me. however, here&#039;s my situation, i have only had ever light and short periods. i have never experienced cramps or sharp pains during my period. during the procedure i had insane cramping right away and i felt like i was going to be sick from both ends at any minute. i had trouble waking and was in crippling pain for 5hrs, and am still in slight discomfort. but from what my mom and the doctors all said apparently that&#039;s just what bad period cramps feel like. ie if your use to bad periods this may be easier for you, but if not you may have a bad time like i did. i suggest bringing a friend with you in case."