"i&#039;m 22 and have not had any kids. i got mirena inserted 3 weeks ago while i was on my period. the insertion was a bit painful, but manageable. cramping lasted for about 2 full days (nothing that advil couldn&#039;t cure). my period almost immediately stopped as soon as it was put in and then a week later i started bleeding again. i have been bleeding since... it&#039;s light, but not light enough to just wear a panty liner. i know several people who have had mirena and say that this will stop after a month or so. my fiance can feel the strings, says it can be uncomfortable, but not bad. so far so good."