Choosing Between IUD and Implant for Birth Control

I'm thinking of getting an IUD or Implant, but I don't know what I should do. With pills, bleeding has become very light and I know that implant would have alot of spotting without it getting better, and the IUD has spotting too but it gets better. With IUD I'm scared of the pain, getting it removed once the time comes, and honestly it just sounds super painful but It's also something I'm considering With implant i know there's a chance my body won't accept it, it's basically being cut open and having it shoved in and taking it out it basically the same. I just don't want to feel it under my skin. I want a leave it and forget it type birthcontrol, but I have no idea what to choose lol.