Without seeing a picture it's tuff to give an accurate answer. However, the front teeth have a lot of enamel on the edges, sometimes 3-4mm before the underlying dentin is exposed (nerve bearing weaker tooth). This allows a dentist to reduce and reshape the front teeth with...
I agree with the other dentists on your question - it is very possible there is a problem with the bonding.
There is a possibility however that your tooth is 'blushing'. This is where the preparation of the tooth went very close to the pulp and there is shine through of the pulp. The...
It's possible there was a bite issue before you had your veneers placed that has gotten progressively worse as it sometimes does.
Assuming this is not the case--yes restorations that have affected the bite and caused an instability may cause some grinding. It could be that the restorations or t...