It's good that work is busy, gives you something to focus on.
Sounds like you're getting what you need to do done. This isn't a recommendation but look up Nolo Press. You might find some help there.
I'm sure the depressed, sad feelings will cycle just like with every other situation that includes grief. Just remember that you may feel that way today but tomorrow you.ll feel different.
Thinking of you.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss