I've had panic/anxiety attacks for many years which is now diagnosed as GAD. I just recently noticed what I think is a pattern and was wondering how many other people this happens to. My most recent incident was a few days ago at Costco. I was fine until I had a heart palpitation which turned into numerous ones because of anxiety causing additional heart palpitations which turned into a panic attack. Then thinking back on the things I avoid because of having a panic attack, they almost always start with heart palpitations that turn into a panic attack. Anyone else experience the same thing?