"i had the iud inserted 5 days ago and so far  cannot comment on its effectiveness but i have to say that the insertion was the most painful thing i&#039;ve experiened and i have loads of tattoos and piercings and a high pain tolerance. it felt like someone was ripping my insides. it was a severe cramp straight away and the rest of the day i lay on the sofa in tears. never had children but i&#039;m assuming the pain i felt was like contractions of early labour. the cramps come and go but i started my period the very next day after it being inserted so i cannot comment on how long the bleeding has lasted or anything. period doesn&#039;t seem any heavier but the cramps are much worse. sex hurts any other way than missionary. so far anyway."