No, when I bring up a subject I find hard or diffucult, I only do that when I've thought about it very long. I started seeing my current T almost 3 years ago (with a break of 1,5 years) and I still haven't told her everything that bothers me. So when I tell her something, then I'm ready to talk about it.

But you've the right to say that you aren't ready to talk about yet. It's your therapy, your money. You're in control.