What is the best option for enamel defect? Veneers, lumineers, or any alternatives? (photo)

I've had my horrible smile ever since I can remember, and my dentist says I have an enamel defect causing my teeth to be discolored the way it is shown in the photo. I am now finishing up my first year in college and am ready to not let my smile get in the way of my future and decided it is time to do some research. I am looking for the affordable option as well as the most convenient (I live in Texas), I need any professional opinions I can receive. Thank you!