I think that you should push yourself to go out and get on that bus, going for a walk, interacting with people, etc. You are letting your anxiety rule your life by staying in the house when you feel anxious. This actually reinforces your anxiety and makes it worse.

I was at a point a few years ago where my anxiety was so bad that I didn't want to go anywhere. The thing was that I didn't have anyone to do anything for me, so if I wanted to live (ie go out and get food), I knew I would have to push through my anxiety. It was INCREDIBLY hard! Going out for maybe half an hour was literally a two day ordeal. On day one I would prepare to go out (which took me longer than usual), I would then have the inevitable panic attack and need to recover. I would then make myself leave the house for a walk, or perhaps drive to the store. After being out for a short while I would come home and crash for the rest of the day. The following day I would do nothing but rest because going out for just half an hour was completely exhausting and I needed much time to recover. Like I said, I literally had to force myself through every excruciating moment of this, but after time, my anxiety did in fact improve.

I know this is scary, and probably the last thing you want to do. However, it was my own form of exposure therapy, and if you go to a therapist, they will likely prescribe exposure therapy to you in order for you to work through your anxiety issues. But, if you can't afford to see a therapist, then this is one way you can work through the anxiety on your own.