Sadsack: I am so sorry to hear about everything that is happening in your life right now. Dealing with depression is enough of a life changing event in itself. Now you have another tragic event in your life. Saying you must be "overwhelmed" probably doesn't even come close what you must be feeling.
I too have been dealing with this debilitating illness for many, many years now. I have friends from college (almost 20 years ago) and coworkers from when I worked about 10-12 years ago and they all remember me as a very self-motivated person who did anything and everything to get work and problems solved. No matter what got tossed at me, I handled it. I"m getting the impression that you were the same.
Thinking about everything you have in your plate now and comparing who you are now to the way you were before - to get things done, is probably making your stress level go sky high. Which in turn is going to make you even more depressed and even more angry with yourself. This is all a vicious circle where your valuable energy is being drained and making your depression so much worse.
Everyone here is right. Start with a part-time job for now. Perhaps if you could do something of benefit for others you might also feel better about yourself too. No matter how hard it is getting out it certainly is worth it when you get there and get going. Take baby steps! And don't keep comparing yourself to before. You need to give your body a chance to heal gradually. Also, perhaps this is your body's way of saying it was overworked before. Think of it as a "broken leg". You have to listen to your body and give it some time.
Okay...enough lecturing here. My thoughts and prayers will be with you and I hope somehow that everything works out with your house. I hope you keep posting. Everyone here is so caring and helpful. It truly helps to come post on your own and to be there and support others.