"i finally had enough nerve to have mirena inserted, but the experience took me by surprise.  i have a high tolerance for pain, but the pain during insertion was more than expected.  i also fainted.  this occurrence is rare and usually happens in only 1% of women who have mirena placed.  lucky me!  when i came to,  i was covered in sweat and couldn&#039;t get up.  my blood pressure and heart rate dropped to a dangerous low so i  had to sit for almost 2 hours to recover.  i was given prescription pain killers to help with the cramps and have had light bleeding since."