"i have had my mirena for around 2 years. i got it about 6 months after having my son. the insertion was pretty painful since i had a c-section with my son and he&#039;s my only child so i never dilated, never had a contraction, etc. the cramps lasted about a week and i bleed for around 4-5 weeks then it stopped but around a 3 months later i started bleeding again and i bleed all the time. "