mirena vs paraguard

I currently have the nexplanon implant. I've had it for 13 months and gained 30 pounds (there is no reason a 19 year old should gain 30 pounds in a year) and my entire body has broken out. I was looking into the copper IUD since it's non hormonal in the hopes that I could lose the weight I've gained with nexplanon but now I'm reading that even though mirena is hormonal people are losing a lot of weight on that as well? anyone have experiences with either of these in regard to weight loss or gain?