ISO BD born on 12/27/79

I am searching for my BD. I was 15 at the time that you were born on 12/27/79 in Chicago, Il. at Martha Washington Hospital. We were then transferred to Swedish Covenant as there was no maternity ward.Your name and birthdate changed with the adoption I am told. I tried so hard to keep you. But I was only 15 and less than 6 months months later I had to give you a better life. I still have the baby pics, birth announcements and baby clothes. I cried for 6 months straight afterwards.I have thought of you and carried you in my heart every day of my life. You were adopted in Approx. late spring 1980 through Catholic Charities/Social Services in Chicgo or Illinois area.