what is IUD?
I felt something inside her vagina that was really sharp. and it hurts when there is penetration.
I feel it on my penis on the side ways and not on the end.

like e.g. if you consider this as my penis ---------------------->
and this part is vagina opening ||

then I get hurt here : x

as shown below

---||-x-------------->

and I also felt it in my fingers and it was something sharp.

I cant explain you more..