IUD- suggestions/ advice

Brittany • 20. Future surgeon. Happily taken. Wanting to give my mom grand kids and grand kittens .. But not yet
So after trying every birth control pill out there it has never helped my periods stay regular and my mom suggested I get an IUD. I've never had kids and I don't mind if I get the hormones or not but I'm not sure if I should get Skyla or para guard. And if anyone has advice or input on their experience I would greatly appreciate it! (It's also my first ever gyno appointment and I'm so scared and I have no idea what to expect)