I work in a health care environment (not a treatment facility).
I don't know if this will help or not but when newly admitted people come in that have known problems with substance abuse we anticipate that we don't get the whole story.
My guess is is that the support there has seen and heard a lot of things if that is part of your worry.
The second feeling I very much related to though was the anxiety I feel when I make a significant behavior change (like breaking my silence). People don't always like it and that is hard for me.
Therapy, Al-anon and learning about addiction have helped me to no be so afraid of this.
Welcome.