Hello, Music Rules Me!
I tend to shut down in the face of people I perceive as hostile or as personally invested in the correctness of their own opinions. This can include doctors and therapists.
In counselling and medicine, no information is far better than false information. I sometimes try to forestall my own tendencies to shut down by preparing printed statements ahead of time. That gives the professionals at least something accurate, and hopefully they'll do their jobs and make an effort to discover what else is necessary to resolve the problem or help.
Wishing you clarity and strength for when you meet with the counsellor.
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My dog

mastered the "fetch" command. He would communicate he wanted something, and I would fetch it.