I had 8 veneers put in. Emax Ivoclar ceramic veneers - did I make a bad decision? The dentist was in Guatemala (Photo)

I am very pleased with the look, shape & color. The office I chose is reputable but the doctor wasn't pleasant, I want to find a local dentist now. I thought there would be no prep but turns out they had to polish my teeth a little so now my original teeth will never be the same. Now I feel anxious and cried because my teeth have been healthy and I wonder if I ruined them for life? I hope to keep these for 15-20 yrs. After that, could I get something like Lumineers on top of my teeth instead?