I know exactly how you feel! I was like that yesterday, didnt leave the house.
I feel safer at home, like i know what to expect and have more freedom- that relieves the worries about not being able to make it to the bathroom, or getting hungrey, because you can do those whenever you want.
The way i deal is i force myself to- you dont want to be locked in your house all the time, like they said agorephobia starts off small.....its hard, i have cried and gotten sick to my stomach, but i knew it had to be done.
Sometimes it is too hard to get out, and i cant do it.....but you are stronger that you think.
I understand, and hope things get better for you (: