I Can't Afford Braces, Invisalign, or Veneers, What Are my Options? (photo)

Hi I'm a 15 yr old girl in 10th grade. I am from a single mother and we can't afford braces or Invisalign or veneers. My teeth aren't very crooked but I do have one tooth that is slightly pushed back. Is there any way to just slightly move my teeth that isn't too costly? Like I've heard spring retainers can do this a bit please help