6 years ago I got veneers on my top 8 front teeth due to severe tetracycline staining. They will never be white because the darkness underneath shows through. I'm considering having Kor done on my bottom teeth but am concerned the color on top and bottom will be too off. Is it worth it to have the Kor done, or will I look worse with the color differences? Is there any way to get my veneers whiter? I feel like I just can't win. Please help as I am so distressed about this.