Some of the veeners have already come off and were re fixed
New crowns/veneers can feel tight at first. Shortly after their insert, the tooth socket ligament adjusts to allow for a comfortable fit. If your veneers feel tight for any more than a few days, their may be excess cement or the contact points between them may be be too heavy.Followup with your doctor and explain your problem. This should be resolved with cement removal or some filing in between the teeth.These recommendations are based on the assumption that the final restorations have been placed.
Go in for another consultation. New Periapical X-rays and a 3D CBCT scan might be needed. Your dentist will have to check you clinically, o make sure there is no infection, decay, or ill-fitted veneers. There is a possibility that the pain is due to either trauma or clenching or grinding pressure as well it's important to check the bite and many other factors. If you can share more information with us I can give you a better answer
