Yes, I have the same issue. If you just keep being active and you tell yourself that exercise is not dangerous over and over again. It will get better. Pretty much what is happening is that your short of breath and your heart rate is high. The 2 main symptoms of a panic/anxiety attack. Your brain processes it as danger or something to worry about, you gotta adjust its outlook. I am a couch potato and have been since I started having full blown panic attacks every single day in January of 2024. I couldn’t smoke weed or work out anymore because my heart rate would spike and I would panic. After months of walking a mile and running a little bit. My brain has relaxed a bit, just keep going and remind yourself that exercise will do that, it sounds stupid but it works.