Mirena insertion expectations

I get my Mirena put in on Tuesday. I was wondering what to expect in terms of them putting it in. I've read it's quite uncomfortable but honestly after having a baby without any type of pain-relieving medication, I think I can handle the discomfort (NOT BASHING THOSE THAT HAD MEDICATED BIRTHS. I WOULDVE HAD IT IF I HAD THE TIME TO GET IT!!)
Any advice would be greatly appreciated!