I am a 65 year old with Stage 3 COPD.
The best advice my therapist gave me was to count 100 backwards or start looking at my surrounding and start counting. For instance I was in the park look at the tree and start counting the leaves on a branch or if I was in the city start counting dirt or sand on the pavement. AS odd as it sounds I understood basically I had to distract my bring from thinking I am not going to make it to think something else!
Now I am completely off of antidepressant. Originally my doc prescribed much stronger RX but none of those oral meds woks quick enough. I was told the best meds is to administer it via shot but I was not keen on the idea of carrying syringe in my pocket!
Also now I can predict when I start having a shortness of breath ( like stairs ) I would just move very slow and stop. Breathing through my stomach helps. O2 level might dips below 80 just for a moment but no panic attack.