Marlyne Barrett’s life is mirroring that of her “Chicago Med” character, now that the actress is battling cancer. The 44-year-old Brooklyn, New York, native, also known for roles on “The Wire” and “Kings,” told People that she was diagnosed with uterine and ovarian cancer over the summer. “I’m an extremely private person, but I felt a responsibility to tell my story,” said Barrett, citing her character Maggie Lockwood’s experience with breast cancer — seen in episodes that were filmed back in 2019. “We as human beings are so scared to face the mortality of life, or to even pronounce the word c…