During a session with T2 (Thanks for your encouragement everybody), T2 was asking question after question after question.

He asked a question about a certain topic X and then my head instantly went fuzzy/tingly, not painful or anything, and then my breathing started to change, maybe getting more rapid. I had to close my eyes and center myself. T2 asked me what was wrong and I said I felt woozy. But that floaty feeling was so strange. He just kept asking me questions but I had a hard time following for a couple of minutes and was slow to think/respond.

I'm assuming that was an anxiety response. Maybe the start of a panic attack, but I calmed myself down? What's the difference between that and dissociating?

After a couple of minutes we were able to resume talking about topic X and I could do it fine in a fairly business-y manner.