Pregnant with an IUD

I got pregnant with my third baby girl while on the Mirena IUD, she is now just over a year old and we are starting to under go genetic testing (per her pediatrician) because she is not developing along with others her age and she has certain facial characteristics to suggest she has some problems caused by the mirena. Has this happened to other momma’s on here? Would love some input to ease my worries or to prepare me for what might be ahead.