I've been there. It's hard. You don't have to do it all at once. Maybe you can just work on it a little bit--answer one question, or if you can't, tell her that you can't. Talking about not being able to answer your T's questions and telling her the feelings are too big, is also a way of working on them. As far as hiding from your T, I have closed my eyes so I don't have to see her looking at me. I know that's childish and may not work for everyone, but it does for me. Or just telling her "I don't want you to look at me" helps. I also ask her "are you sure it's okay to talk about this" and get her reassurance. That helps.

It's okay to switch to another topic in therapy because you WILL get back to this. That's how therapy works. It may seem like a roundabout process but we do get to what bothers us, in baby steps, sometimes.