Oh Debbie, I'm so sorry to hear that. What shithouse thing to have to deal with. I'm not in your situation--are either your oncologist or surgeon or what ever other 'ist' is involved able to give you more information? Living alone is fantastic ( I do too) but it can add another level of complexity when you are not well and it is not at all surprising you are depressed.
If you don't already have one on your team, do you think seeing a counselor of some sort may be useful? They can't make the problems go away but can be good garbage bins to dump all sorts of stuff in and, occasionally, they can come up with helpful hints to manage stress and anxiety. You will qualify for some subsided visits to a mental health professional, though your location can dictate your options and the out of pocket costs. Ask you GP or breast care nurse about getting a referral. Even getting to see someone who doesn't suit can be therapeutic--I've trailed a couple who have made me feel positively sane, in comparison..., Mxx