So I had a panic attack two days ago. This was the first time since November I had one. Well, since then. I've been having heart palpitations and its causing problems. I've tried exercise and going for a long drive to get them to stop, but they won't, and its really starting to affect me. Any tips on how to make it stop are appreciated. And before I'm asked, I've been tested for all kinds of heart related stuff all last year and was given the all clear.