I once tried journaling through a full blown panic attack. I suspect it helped but what I do remember most is that I ended up with a piece of writing I was really happy with. I still have it around maybe 15 years later. On rare occasions I have shown it to people who don’t have panic so they can get an idea of what it’s like for some of us. Only people I trust though, as my (crisis clinician)friend said: some people reading that would think you were having a psychotic break, but it’s just severe anxiety. Maybe I’ll try it again & see how it goes as a coping mechanism..