Think the origin is definitely stress related. For a number of years I would only get the odd panic attack maybe one every couple of months. Didn’t even know they were panic attacks at the time. They only seemed to occur when I was driving on the motorway. Randomly out of the blue I’d feel like I was going to faint and go all dizzy and get a sense of derealization. Driving everywhere else was fine. It was weird because I’d always loved driving and was pretty confident. Then the attacks started happening in work when I was in a busy office or out socialising. I only realised that they were panic attacks when I googled “going dizzy when driving”. As for exercise no I hardly get any and I know it’s something I should change. Probably also my diet too.