"i was very excited to try mirena. i experienced the normal, cramping and extreme discomfort and pain immediately after placement. my cramping and pain lasted longer than normal.  roughly 15 days after placement, i became intolerable.  it was the worst pms i can recall ever having.  i wasn&#039;t that moody when i was pregnant.  then my period came and it was the longest, most painful period i have ever had.  i went from having a 3-4 day period with one day of cramping to a week and a half period with 5-6 days of cramping.  next month, same thing.  needless to say, this is coming out."