In this type of case, a series of situations may be happening, all related to the gums.
When the gum limit is passed with the material of the veneers or with the cement, this may occur.
you should go to your doctor again or a second opinion.
I am sorry to hear about your experience. Hypersensitivity is not supposed to last for more than 6 weeks. Please have your bite checked and consult with an endodontist. Without more details and x rays, its the best advice I can give you,
Joseph Goodman, DDS, DMD
Beverly Hills, CA
Veneers and crowns can be an option instead of orthodontics. Your anatomy and bite do play a factor in how much your dentist can move or close a space.