Which state are you in? I think the reason that you got your license is not just luck. I'm guessing your license expire because you are turning 21? So you got your license at 16, so it's about 5 years ago. I think 5 years ago, there were dozen state that still gave out license to undocumented immigrates and your state happens to be one of them. Right now Washington is the only state that give out license to undocumented.