> The secret with anxiety, for me at least, is to not care if you feel anxious and to let it pass.

I think that's very insightful, since so often the "panic loop" is driven first and foremost by the anxiety over feeling anxious. People feel the stirrings of anxiety, and having had a panic attack, they're terrified of that sensation returning, which fuels their anxiety and focuses them on those feelings. It's a vicious circle which is hard to break without practice, and for some, medication.