Adoptee with question and not sure where to go

I was adopted 24 years ago when I was only three days old. For as long as I can remeber I've known I was adopted. I was told I was adopted because my Bmother died with complications while giving birth. I have always believed this and never thought anything of it. I know things like that do happen, but not sure how often. My husband and I are talking about having kids in the future. But the one thing that has always bothered me is that I don't know my medical history. My adaoptive parents would always put there history on doctor's papers, why I don't know. I am really wanting to get my medical history and my husband supports it, due to the fact of how my bmom die. I inquired a company to help me and got absolutly no where, and treated me like I was stupid for wanting this information and told me my adoptive parents probably lied to me about my bmom being dead. I am just wondering if anyone else has looked for their medical history or knows the route I need to take to obtain my medical history. I thank you in advance for your help!! I truely means a lot to me and my husband!! I'm really bothered by what the lady at the company told me cause I never thought about finding out who my bparents are, until now and not sure what I want to do. Thanks, Kari (ps I live in Indiana if that helps)