Just try to relax and calm yourself. You will get past this!
I read about another woman who has a tilted uterus and it was perforated during insertion, I think there is more of a risk of perforating the uterus but again im not sure.
I was sent to the O.R. for a laparoscopy surgery to find the lost iud. My dr also added a tubal ligation. So my recovery was two weeks. Not fun, they gave me percocet and 600mg of ibuprofen,you will need these the first week.
You can do it, just try to be calm, this does happen to women, I never would have believed it, until it happened to me. But if you have a good dr she/he will set up a surgery to remove it ASAP.
Hang in there~prayers