Depending on what's on your mind, I'd say falling apart is a distinct possibility. It's not always ultimately the worst thing, it could allow for you to come back together in a way that works better and is happier and freer. But it's really effing daunting.

Could also be that no such thing will happen and you were just taught that it was dangerous to say stuff. Maybe it would be worth talking about the fear of falling apart? What does that mean? What would that look like? How could your T support you if that happened and what would it take to rebuild?

I have just come out the other end of falling apart. Not so much me falling apart in the sense of a mental health breakdown but my life falling apart in the sense of divorce, leaving a bad relationship and having to reexamine much of what I thought I knew. It's gnarly. But I breathe more easily. The falling apart was a net gain.