Searching for my sister born in Michigan

My sister was born April 17th 1971 or possibly 1970. She was born at Providence Hospital in Southfield Michigan. Her birth mother's name is Janice Medlock. Janice was forced to give her child up after be forced to stay in Marillac Hall until she gave birth. There are some serious health issues that my sister needs to be informed about. To you my dear sister...where oh where could you be??? My heart aches not knowing your fate. A little history... I found about you when I was 10 and boy at that time I sure needed a friend. I have had this hole in my heart ever since that day. I am sure you grew up happy with a wonderful family. I do not want to destroy that in any way. Nevertheless, this sister of yours needs to connect with you. We didn't have a choice back then but we do now. Lets talk!