oh yeah, big time. once my experience with agoraphobia elevated in severity to not being able to go beyond the mailbox, i totally lost condition and stamina. it devastates me. when i lived in a city where everything was accessible on foot, i was much better off and walking to music was a daily compulsion fulfillment.

after moving three years ago i really just shut myself in and now feel like an unfit slob. hell, i bought rollerskates two months ago that haven't left their box since the day i got them because of the dysfunction.

i don't have any helpful advice, but you're not alone in this, and i think it's probably really common -- especially when it reaches this severity. i would suggest you try to get some blood work done, at least, to get a baseline on your heart and thyroid, and go from there. panic disorder targeted mindfulness might be something you could look into, as well.