Cardiac implant monitor??

Carly • 3 little girls! Riverlynn 6/18/2013 & Rynnleigh 8/13/2017 & Rosalin 11/6/2018 and 1 little boy due 5/8/2021!
Does anyone else have this?? I am having the procedure done Sept 15th and I'm beyond scared! If you do have this was it painful at all?? I have to be awake for it so it's even more scary!