I Am Halfway Through Invisalign Express and my Teeth Are Looking WORSE! Should I Quit?

My dentist suggested I get invisalign express to correct my shifting teeth I had from braces about 12 years ago. Not wanting to get treatment from a general dentist, I visited an ortho and she too suggested express. I regret not getting full treatment. My arches were very narrow to begin with, and now express has moved my six front teeth downward and outward, making my arches look even more narrow and displaying my front teeth even more of a bucky like appearance.