I don’t share information from or about you, unless I think that someone is at risk of serious harm. In this instance, I would seek to discuss it with you first.
I work with a supervisor, and they quality control my work. I discuss my anonymised case work with them. They make sure I am working ethically and effectively, in your best interests. They never know your name, or any details that would allow them to identify you.
All reputable counsellors and therapists work with a supervisor, and this will be enshrined in the code of ethics and practice published by their accrediting body.
I will email you a 'statement of understanding' before your first appointment which gives you more information.