I.G.
No experience, just my sympathies and two items I personally would insist on: ask for a referral to a gynecoligist who is experienced with IUD's - hard to believe, but not all of them are and actually many primary or ER physicians have no training in placing or removing one at ALL.
Ask for an ultrasound and have any further attempts to remove it under ultrasound guidance.
I have a Mirena IUD so I did some extensive research before getting it - unfortunately embedding in the uterine wall is a possible complication, though uncommon.
Make sure the GYN knows about your plans for a pregnancy and discuss any possible implication.
Good luck.