"i have had mirena for almost a year now. i got it in october 2010. i am 17 years old with no children. other birth controls did not work for me. so my ob/gyn and i decided to try mirena as a last resort for my woman problems (cysts,heavy bleeding).  when i first got mirena i was in terrible pain, but i had also never had children so my cervix was really tightly shut. the procedure lasted about 3 and 1/2 minutes then the pain lessened to intense period cramps.  after that i had my period for 2 months straight with serious mood swings, cravings and weight gain. i&#039;ve gotten the weight off and am period free! love it!"