Don't give up. Go back to the doctors and this time make sure you go. Maybe you can take somebody with you that will give you support. Or try going on sites like meetup and find a group. That might help take some of the isolation off. That, or going to the chat rooms on here, you might find something there to keep you interest.
I too am stuck at home, depressed,and can't stop eating and I have no where to go. To help, I got netflix and started watching my favorite show. Even if I'm not watching it, I'm listening to it in the background. Hope this helps