Mom was adopted in La Porte in 1970, looking for grandparents

My mother was born in and adopted on July 19th, 1970 in La Porte, IN. I am searching for my biological grandmother/grandparents. I don't want to put too much information out on the web, but if you think this might be your daughter, PLEASE contact me. I have always wondered about you, wondered if maybe I look like you since I don't look like anyone else in my family. Please, if you can, send me a private message. I would love to be in contact with you and possibly meet you.