“Am I breathing right?”

tends to help get things going.

If it doesn’t work, and you actually calm your breathing instead, try prefacing it with an “Oh no!”, and if that doesn’t work still, try framing it in the negative, with more urgent alarm…

“Oh no! Is my breathing wrong?!”

Then you can really get underway with anxiety, moving on to things like “something bad is going to happen”.

With a little practice, you can build up to full blown panic attacks in no time.