Just received my non identifying information....

Background: I live in Atlanta, GA. I was raised by amazing loving parents and always forget that I am adopted until the doctor ask me about my medical history or I hear the word around other people or on tv. I am 24 and I have a brother that was adopted to he is now 27. His birthmother was 14 when she had him she left him a note with her first and last name and apologizing and let him know she will love him forever and he found her on facebook and reconnected with her and his bio sister and met his bio father.( the mother and father were not together) Every time he would talk about his bio sister it would piss me off when he would call her his sister or refer to his bio mother as his mother. I felt alone and angry that I never found my biofamily. I realized my emotions were because how I was feeling inside and I need to resolve my own issues....A few years went by the feelings were getting stronger to search. I never wanted to hurt my adoptive parents so I never wanted to ask them any questions in fear of them questioning my loyalty. These were all my own emotional assumptions... (I did end up telling my mom) and she hugged me and welcomed the search with open arms..... My mom has my information stored away in a place in her bedroom. As a kid I would periodically go and check it out when I got curious and one time when I was 21 I tried search but I was way to emotional and during the search there are a lot of brick walls so I put it back down and have recently picked it back up. From the information I gathered from my adoptive parents file is my birthmother was 35 when she had me... and registered nurse... and no one in her family knew about the pregnancy... it didn't have any info about the bio dad, I couldn't even tell if he was aware of the pregnancy it was left blank instead of circled. I contacted the agency and paid $35 for my non id info. I goes into all of the details of my actual birth and goes into more detail about my bio mom and bio dad. She was 35 at the time of birth, she was from up north, she had a nursing license, and was in a contract job in New Orleans and then came to Atlanta to try out the city. She got robbed 2 months before I was born and she was staying in day shelters and needed a lot of help from DFCS. Living,financial and counseling. DFCS wrote in her file that they believe she was using cocaine but they believe she wouldn't not admit to it due to the possibility of her losing her nursing license. He social worker described her as very bright, independent, and very appealing. He was in shock of the accusations of drug usage because she never appeared to be using them from his prospective. Its documented in my file she moved and checked into rehab after my birth..... As far as my bio dad, he was 24 at the time of birth, and he was unemployed. DFCS and the court tried to contact him by mail but never received a response from him. Its documents she left his address and full name for my record. (the agency did not disclose his name or address) Before I received this information I had prepared a letter to request contact. Now having a little more insight on the situation and with drug accusations I no longer know how to approach the situation... to request contact..... Please give your thoughts.... thank you :)