Sorry to hear about your wife. We have a 10 year old daughter with CF. so I know what that entails. I am also taking meds for depression and so far no luck for me. I would think if they offer you some type of work you would have to attempt it. But only if it is something you can actually do. I was hurt in a factory and they offered me work for awhile but I kept getting worse(4 knee surgeries) until there was nothing for me to do. Whatever you do, do not give them a reason to fire you. You know that's what they want to do to you. I applied for SSDI and have been turned down 2 times. I go before the ALJ in June. Some 3 3/4 years later. Good Luck!
This is what my employeer tried to do to me.