Searching for half sister born 1970 in Chilliwack

Hello! I feel like this is kind of a long shot but I figured I'd give it a go. I'm looking for my half-sister whom I've never met. She was born in Chilliwack at Grace Hospital on approx. June 17th, 1970. Our Dad and her birth mom were only 19 and so they give her up. I have both the birth parents names if anyone knows anyone fitting this description, I feel like it's probably not a good idea posting them online so just contact me if you would like the names. I've been raised as an only child and have known she's existed since I was 8 years old and ever since then I've always felt this pang inside knowing that I actually have a sister out there somewhere that I can't talk to. If anyone can help at all, I would forever be grateful. Thank you for reading, -J