My Daughter Has Drug Addiction Problem

I believe my daughter has drug addiction problem. She is not even realizing that how much we are getting hurt due to her addiction. I am extremely worried about her strange behavior like stumbling around at night, repeating the same thing over and over. I have planned to talk to a counsellor at an addiction treatment centre in Toronto, where we live. Has anyone faced these types of symptoms? Can anyone here suggest me in this concern?
I'm near Windsor, ON.

How old is your daughter?

Bob