About 2 months ago a got veneers, at the beginning my teeth were super sensitive but got better with time. About 3 days ago one of them started hurting constantly so I went back to my dentist, he took x rays and said that everything looks fine and just gave me a prescription for pain. Also said if it doesn’t get better he will send me to a root canal specially but I really want to avoid a root canal if I can. Why is my teeth hurting constantly???