"i am 17 years old currently on the mirena. i have had it in for just a couple of days nows. i do not have kids. the insertion was not a cup of tea. the most pain i had was when they had to clamp my cervix. other than that it wasn&#039;t bad. i had 2 days of light cramping (just take some ibuprofen) but i was able to go right back to school on monday. i took the depo-shot one time and it caused my period to run on for 2-3 weeks. i&#039;m not at all a pill person. good luck!"