Just have questions, I was born 04/22/70 in Indianapolis

I am in search of my birthmother or any other family members. I was born at Methodist Hospital in Indianapolis, IN @ 4:00 pm on April 22, 1970. The attorney that handled the adoption was Rosemary Adams Huffman. She will not release any information to me. Both of my adoptive parents are now deceased and they gave me little details concerning my birthmother. I know that my b/grandfather's insurance paid for my birth, my ped. was Dr. Brown. My b/mother was eighteen at my time of birth and was planning on attending college. She might have been from Greenfield or Greenwood, IN. I have just relocated to NC, but still have questions that I feel need to be answered, my children would like to know a little of their background. Please respond if you are out there, I don't want to give up my search !!!