I was also panic free for two years. When I had my first attack it helped to blame it on something else. So I said it must be becuase I didn't eat, or I spent too much time thinking about this, or I am stressed out, or I didn't sleep enough. That helped me isolate the incident and convince myself it was just a fluke thing. So you might want to try that. Find a rational reason for it, something that you could easily change, like eating breakfast. Good luck!
