Elysium,
YES! YES! You explained it exactly! That is just how it feels to me also. I took your advice and emailed my t about it. She replied also that it sounds like anxiety and suggested some deep breathing.
Thing is. . .I sort of triggered myself too because after feeling that panicked feeling, I instinctively wanted to turn to t for help. Then it came into my mind that she'll be retiring before too long. The thought of having anxiety attacks like this and having my issues splayed wide open and then having her leave struck fear in my heart! So I ended up following up with a second email, asking her if she'd at least be working another 2 years. As usual, she wouldn't say. She always tells me that (1) she doesn't have any set plans yet, or (2) She doesn't know the future. It's SO HARD not knowing when she'll go. Somehow, I feel like if I knew really far ahead of time, I could somehow be prepared and it won't hurt so much. Or maybe not.