One of the side effects of the IUD is back pain, but I'm not sure if this counts. It is under my ribs/at the bottom on the right side, and just feels like an aching that lasts hours.

Worried in case an infection could have spread when the iud was put in, and can't seem to find much related to my question except abominable pain.
The IUD I had was the Mirena, got it on the 3rd November and all is well at the moment, only had spotting for 2 days after insertion and cramps for a few days.