Hi! I worked as a data scientist out of undergrad at a big tech company, and had the privilege of meeting folks from across a spectrum of life and professional experiences: from career changers, to pipeline-from-CS-programs, PhDs-turned-data scientists, etc. Seeing that we're all humans, have made mistakes, I don't see why you can't become a data scientist—especially since you've demonstrated you are more than willing to pursue that path through your classes, kickass GRE score, etc.
I have a friend who did a career change, went to the data science program at USF, and is now working as a data scientist; it was fascinating seeing the parallels between our career paths. Feel free to PM me for more details or questions!