I suspect your T would want to talk with you about this in the hopes of changing your behavior. The info does put the T in a very ethically difficult position: keeping confidentiality vs acting in your best interests. If what you're doing doesn't pose an immediate threat to yourself, I would guess your T would not disclose it, but would keep bringing it up with you. And your T may choose to insist upon disclosure by you to your pdoc as a condition of continuing therapy.

If you are seeing them within an institutional setting, you would need to check if there is any assumption that by seeking treatment, you have given permission for info to be shared between all professionals involved in your treatment.