IUD’s Myth or Reality?

I’ve been battling with the idea of removing my IUD. After 5 yrs the symptoms I get are a bit too much than when I started, especially my irritability before I get my period, also I’ve notice some brain fogging after a couple of years, I’ don’t remember how to say or pronounce/ write words I would use often and my forgetfulness has gotten worse. I used to be ok at remembering patterns and now I forget things after 5 min. I have a copper IUD. How true are these symptoms or are they a Myth?? Opinions or experiences are appreciated.