Looking for My Adopted sister, Born in PA

Hello, my name is Nicole. And I have been searching for my adopted sister. Some facts: She was born in Berwick, Pa at the Berwick Hospital Center. Her birth name was Christine. Her adoption was done by Catholic Charities. Now, the age I am not clear on. I have red many of the post here regarding Catholic Charities and how the birthdate can be change. My mom was so heartbroken by having to put her up for adoption that her memory on the date is not clear, and no one at the doctor's office will seem to help her. All she wanted for my sister was a good home and parents that were able to provide her with what my mom couldn't at the time. My mom would love to find her as well. My mom's name is Florence and she is 62 years old. Her last name at the time was Hunsinger. The year is either 1971 or 1972. If anyone has any information that could help us, please PM me. I would love to get to know my sister. It has always felt like someone was missing in our family. I have two older sisters and an older brother and we would all love to find her as well. God Bless, Nicole