I used to SI about 30 years ago. Then it stopped, although looking back I was using other unhealthy strategies to manage my feelings.

SI kicked off again after starting T. Not sure if it was the T or just because I was not in a good place at the time.

T was aware, think they probably asked about it at sometime as a general question
But they did 't over react.

I think it might be helpful for you to share so your T has knowledge of how you are coping with stuff. Then it might be that you explore triggers and other ways of managing your feelings.

Take care. Soup