If you get a therapist you should ask what kind of things would the therapist be mandated to report. Usually it is endangering yourself or somebody else. If your family situation is bad enough that the therapist feels you are endangered they might report it but I don't think a therapist would report drug abuse unless they feel it endangers somebody. When my Pdoc asked me if I used any recreational drugs I asked him if he was going to record it in my notes if I were. He said nobody had ever asked him that before which surprised me. I agreed to talk about my drug use as long as he did not record what we talked about.

I wish you luck finding a T you can trust.