I just had my lumineers glued on about 2 weeks ago. After the first fews days I noticed a slight stain on my right canine. And now 2 weeks in I've noticed that the overall color has changed. I'm also seeing the lines where they were attached. Is there a chance that my dentist installed composite veneers and not porcelain ? If this is happening that early, I'm wondering what they would look like in the next few months!? Someone please enlighten me