Yes . Yes it is possible. You need to see a dentist for proper diagnosis and treatment plan.
Yes. Be sure when consulting your dentist they check to see if you are a grinder. A night guard may be needed to protect the teeth. This may also have contributed to the problem from the beginning.
Unclear question. What you mean by the word veneers?
Yes. Absolutely. Done all the time. Must monitor the wear and rebuild / replace as needed. Assessment and correction and adjustment of the bite may be needed.