Okay , so I will give you my experience....
I have had 2 iud's..One hormonal, and one non hormonal. I have the non hormonal oe now because the hormones in the other one did not agree with my system.
The hormonal one I had nothing beforehand, no medicine at all..So I felt it...
There are two big cramps, not sharp pains, or freaky feelings..Just cramps..
First they measure you, big cramp number one, lasts 5 seconds..Literally!
Then they put it in =) big cramp number two! 5 seconds..You are done..
With my non hromonal iud, I took ibuprofen =) and a vicodin I had laying around ;) I felt nothing, except when she measired me... And that was not too bad at all...
It is worth the cramping..I reccomend planned parenthood on albemarle rd in charlotte nc , just inc ase you want to know where it is..