"i has mirena inserted when my daughter was four months old. insertion was painful because i had a c-section and my cervix never dilated. i had moderate bleeding for about 7 days after insertion. however, i have not had a period since...no cramps, no bleeding, no headaches, no acne. i don&#039;t have to remember to take a pill everyday, and i have experienced no negative side effects. i give mirena an a ."