Is it normal to feel the "Sunday blues" all week long?

Lately it seems like every aspect of my life has lost all taste and meaning.
I'm by every definition of the word: depressed.

But I shouldn't have a reason to be.
My life is objectively better now than it was in previous years. And yet all I can think about is the fact that I'm not as far ahead as I thought I'd be by now.

And it's affecting everything.
My diet. My sleep. My social life.
I'm a train wreck and all without a legitimate reason.

I'd say "go to therapy" but I can't even afford therapy so I'm all out of options.
I spend my days at the gym as a substitute but even my progress is hindered due to my messed up body function.

Is is a subtle cry for help in the form of advice. I'm not expecting anyone to snap me out of my current state of mind but I would appreciate any and all input.
Yes. It could be a phase. We all get them
No. It's clear depression and if left untreated it could fester
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Is it normal to feel the "Sunday blues" all week long?
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