A. You can have veneers at your age but if you do you need to go to a dentist that knows what they are doing. If they are carried out badly it could be very detrimental to the health of your teeth. Ask you parents to take you to a cosmetic dentist to find out what your options are. There are less invasive treatments that may be available because some discolourations can be cured without veneers. It is very difficult to tell without seeing you.
kind regards