Chin up sweetie. Even without the IUD you only a certain percentage of a chance that you would get pregnant anyhow. I would have been shocked if you were pregnant at the first "go" IUD or no IUD. Don't worry..I'm sure it will happen. The big problem birth control product is Depo shots. it can sometimes take 2 years to get fertile again.
Re: TTC after an IUD?
There's a few on the first page.
https://tipsforgettingpregnant.org/birth-control-and-the-effects-that-it-can-have-on-your-fertility/