I am both an adopted child AND a birth Mother...?

I was born in 1972 and placed through Social Services. My son was born in 1989 and placed through Catholic Charities. Does anyone know where to start or what to do / where to look to find any information on my son or my parents. I can't afford to pay anything. I'm barely getting by on disability at this time. Did the Freedom of Information Act open up any avenues for adoptees or birth parents. If anyone has the same situation and / or can give me any information on where to start looking I would be very grateful. Thank you to anyone who responds for trying to help. This is such a BIG unfinished chapter in my life that I would love to close somehow. I would appreciate any information you can give me. Thank you SO much!!!! Mary