welcome to HealthcareMagic
There is one question did you have a baby before & was it by LSCS .If it is like you delivered a baby by CS or if you did not get pregnant then in such cases the cervix
of a female is very small & difficult to get through.So the problem will be mostly as i feel a cervical stenosis;which is causing difficulty in inserting the coil.
I guess that is the reason why they took you to a hospital so the doctor can perform dilatation & then the coil can be fitted.
Hope this answer is helpful to you.