Why does work make me so depressed?

There were times in life where 40hrs didn't feel like a lot, in fact I'd work 70hr weeks with two jobs.

But now it makes me so depressed, that all I can think of is ending everything. I'll work a basic job that pays pretty good; and I'll feel like it's physically killing me.

I finally opened up to my husband about this, and he's letting me put in my two weeks. I miss being home, cleaning and making meals everyday. Work has taken all my energy to do anything that makes me feel fullfilled. I just want to understand why work suddenly has this affect on me where every day is miserable.

Why does work make me so depressed?
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