Maybe it would be beneficial to say that there is something that is causing you pain that you can't talk about. At least that addresses that there is something. I can imagine that a T might be a bit curious and want to try to ask a question or two but I think a lot of T's would just respect that and wait until you are ready to talk about it. My former T was really good about not pushing me to talk about things that I wasn't ready to talk about. Sometimes I did write them down and either email it or bring it to session and then I didn't have to talk but I could still communicate. I once had an entire session where I just wrote everything down on her yellow legal pad and didn't even say a word. It helped to be able to communicate without having to talk. Sometimes I would bring in drawings too that she would comment on, but I didn't have to talk about. But if that is too much, then try to listen to yourself and know where you are at. Its okay that you aren't ready to talk about it. Sometimes I try to push through a little uncomfortable feelings but not always...sometimes I know I just can't. Its never easy to decide to talk or not talk. Its a good sign I think that you are talking here. I hope that you get some support here that helps you.