It definitely sounds like your panic disorder could have morphed into agoraphobia. I can now go shopping without having a panic attack but I usually know a couple weeks ahead of time that I am going shopping so I have plenty of advanced notice. but I still cant go out to lunch or go to a drive thru to pick up anything for dinner. I don't have specific reasons why like you do, I just feel so overwhelmed at the idea of doing it. I go to three events a year and I either take klonopin or I am drinking to get thru it. I really have no quality of life because of it. sometimes it takes hours to leave my apartment because I am afraid if I open my door the sun will evaporate me to dust. sometimes I never leave. I stock up when I shop so I rarely have to go out. I keep bringing it up in therapy, but t has never had a solution. he figures since I do get out to get the things I need that that is good enough. take care.