Getting an IUD, Help!!

So I’m getting a Mirena Mini for 5 years and I am a little bit scared of the pain it might cause, I’ve read a bunch about it and most not to say all of the blogs and posts say the insertion hurts A LOT, a couple girls even said they were unavailable to stand after an hour because of the cramps and deep pain. I need some advises please, I’m have the appointment at the end of this month and I’m freaking out already.