I think at the beginning you don't necessarily need to trust the T but you need to trust the "process". It is hard for me to trust people, and it takes a while, trust is earned. For me I went in and said what I needed to at the beginning re: basically what was going on and such but then I let things out gradually. I would say something small and see what she did with it and worked my way up to the big stuff from there. I wouldn't recommend going in and right away talking about the thing that is most difficult for you, the therapist won't expect you to either. Start slow, feel things out, and do what feels right for you. If you try it and don't like it, you can quit. Might as well try right?