Okay I'm going to be real. It hurts real bad for a few second and then it immediately subsides to general cramp feeling for a few days. My doctor had me take ibuprofen an hour before and then again three hours after. I took it regularly for 4 days and then it became completely manageable. Make sure you don't have anything to do after the procedure. Go straight home, take a nice hot bath, and curl up in bed with some Netflix. Just straight pamper mode like you do when you have period cramps. It's well worth it to me! I've had mine for about a month. I have occasional light cramping and I'm spotting a lot but it's seriously helped my libido! My birth control pills were killing my moods in every way. 

I had to take a pill to open up my cervix area because I haven't had kids, and I was having mirena placed...I would recommend taking a pill the dr recommends to relax that opening before inserting an IUD, it really helped ease the process:)

i just took some ibuprofen beforehand and kept taking it with paracetamol during the day and was fine, it really helped!! good luck!

Just got mine today and the nurse reccomened eating before and after? I didn't eat before, but eating right after helped distract me from the cramps... I also second the lazy day advice from above!