Born in Baltimore, Maryland 1962-65?

I am a female adoptee born 2-17-1960, searching for a female sibling born in 1961-65?. You were born in Baltimore, Maryland. You might have black hair and blue eyes. Also in search of birthparents, Mary Katherine (or Catherine) Mitchell and Harry Anthony Herget. Who gave birth to two female children in Baltimore, MD, one in 1960 and another between 1962-65? Please, if there is an angel out there to help me. My email is marys4317@gmail.com.