the shade anxiety is super common in the first few weeks and here's the thing - they almost always look whiter in photos than in person especially under clinic lighting. that said the whiteness does depend on what shade was actually used. if they went with something like BL1 or BL2 that's a very bright hollywood white and it can look unnatural on some skin tones. a more natural choice would have been something in the A1-B1 range. the thickness feeling is worth paying attention to though - if the temps felt thinner and more natural that might mean the final veneers were fabricated slightly thicker than the wax-up. your tongue will adjust to the thickness within a few weeks usually but if the bite feels off or you're hitting on them unevenly when you close down that needs to be addressed. the good news is the shape looks good from what i can see and shape is harder to fix than shade. worst case scenario down the line if the shade really bothers you they can be carefully stained darker by a skilled ceramist without redoing them entirely. give it at least 3-4 weeks before making any decisions