Im my experience the more you try to analyse how you feel the more you are confiming to your brain that it is very real and the stronger the feelings get.
Try not to put a lable such as "agoraphobic" on what you are feeling. Dont make a decision to stop work/college/university etc.... Just carry on with your life and take each day as it comes, do what ever you feel comfortable with each day then push yourself just a little bit futher.
Just because one day you feel unable to do a particular thing dont then decide to yourselfthat you are now unable to do that thing or go to that place ever. It isnt true, its only you that will be worsening your condition if you think like that.
Ok so who am I to say all this? Well I the person that did it all the wrong way for 5 years at the worst of it I was unable to even open my front door let alone step out of it. Ive been through the horrendous nightmare and finally realised where I was going wrong and am now on way to getting my life back. By the way try the linden method it really helps!!
Hope ive been of use to anyone who reads this. Dont give up - you will get better :o)