vaginapagina | Mirena IUD Cramping

Hi all, I am posting on behalf of someone else. She is 22,does not have kids, and got the mirena IUD one week ago.
She's been having a lot of cramping and of course the expected bleeding.
She was getting some advice from a former OB nurse and the nurse said she shouldn't have got the IUD without having kids. The nurse said she should have got the depo shot instead.

Well, the cramps are pretty uncomfortable and she's second guessing her decision.

Would some of you be willing to share your experience with the mirena and how long it took your body to adjust? Especially if you haven't had kids.

Thanks so much!