It's not a veneer that fell off, it's just the temporary composite stuff they cover the teeth with till your veneers are ready. I'm going through this for the second time in my life and I'm just happy to HAVE the temporaries this time, much less painful. I know they are ugly and a pain in the butt, but you'll be so happy once you get your veneers put on!!! My temps haven't popped off, but the dentist did tell me that the temps come off easily and to just come in if that happens. You'll be fine, just smile with your mouth shut and be really careful until you get your veneers put on. You will be THRILLED with the final results and it will make this horrible two weeks well worth it!