Wow, Donna,
This sounds like a big change and something difficult for you.

Depression can run in families. Does he have close relatives with it?
It sounds like he might be working it out in his own way. I hope he makes it out the other side.



Regarding the house making you sick:
Do you have a newish house? One that is sealed up tight against the weather? That can be bad.

In my area of the country we worry about mold.

How about something in the house that is new like new carpeting or glue?

Here is a government web site listing common problems with buildings:
http://www.epa.gov/iaq/pubs/sbs.html

--Inadequate ventilation
--Chemical contaminants from indoor sources
--Chemical contaminants from outdoor sources
--Biological contaminants


Basically, going a way from a home for a while like you did -- is a good test that something inside the house is bothering you.
Maybe try opening windows and doors for some ventilation.
M.