Several years ago I went through the same thing when I had to deal with handling my parent's estate when they died only weeks apart. Stress is nothing compared to depression and I doubt there are many, if any, who really understand it. It's during these times one needs to gather in close those important to you. I didn't and I pushed away; I don't recommend it.
Disengagement from the current depressing matters is important, no matter how brief. Doing anything involving cardiovascular activity will do wonders; there's a lot to be gained from an hour in the pool lap swimming regardless of how proficient you are.
The monolithic CASA, and the majority of it's minions on short-term contracts, is not supportive of individual circumstance and is not your ally; tell them nothing at this point. Discuss with your GP before discussing anything with your DAME.