McCain attended The University of North Texas where she completed a Bachelor of Arts in Biological Science with minors in Chemistry, Spanish and English while working as an emergency medical technician. She was then accepted to The University of North Texas - Texas College of Osteopathic Medicine in Fort Worth, TX where she completed a Doctor of Osteopathy degree. Her residency match was McLennan County Medical Education and Research Foundation's family medicine residency program in Waco, TX, which she completed in June of 2018.
She is an osteopathic physician who practices full spectrum family medicine at Goodall-Witcher in Clifton, TX. Her educational journey began in a small Texas-Mexico border town (Eagle Pass) where she was fortunate that her high school offered health science technology education courses. After having taken several of these classes taught by an amazing nurse who served as a mentor to her and doing a summer internship at the local hospital, she set her sights on medical school.