born 5/4/1978 chicago

:) I was thinking of starting to look for some records or something about my birth parents. I was born on May 4th, 1978 I am female and my a-parent's say I was left at the hospital because I was only like 1 pound 6 ounces. Last year when I was looking through some of my adoption stuff I found a piece of paper that had a name that's not my a-name. Plus, when I was in the hospital my a-parent's didn't or couldn't name me officially yet so I have Happy b-day signs that say that first name, the reason they say, is because they couldn't name me so that's the name the nurses thought of for me. I don't really know where to start. I was thinking of starting at the hospital and I don't really want my a-parent's to find out right now. I don't really think I want to meet them either at this point in time. I've been thinking since I turned 20 that I should start making an effort to find out anything about me, either medical I should know or if I have any brother's or sisters. Sorry if this is kind of loose I don't really know what to write. If anyone wants to know anything more about me just post.