Man that's tough times in the valley. I've been there a lot the last couple years for the same reasons. You are not alone.
At times like this I recall the second part of the serenity prayer, it helps.
I find doing tasks can refocus my brain along with use of mantram. The problem is between my left and right ear - nothing more. Typically my lows are deeper when I procrastinate and act in a slothful manner. It takes effort to drag myself out of this but when I can using spiritual tool and my own initiative the clouds let the sun come out, mostly.
Yesterday was really bad and I was somebody else. I didn't panic but simply went to bed very early and slept for 10 hours. I was exhausted. Today was much different outlook and I looked at things with more energy.
A friend announced his cancer had returned and was told less than 6 months to live. This was jarring as well and woke me back up. My jazzz turned to gratitude in short order.
Thanks for posting this - it helped me to type this out. You are not alone in the valley my friend.
Living one day at a time,
Enjoying one moment at a time,
Accepting hardship as a pathway to peace,
Taking, as He did,
This sinful world as it is,
Not as I would have it,
Trusting that You will make all things right,
If I surrender to Your will,
So that I may be reasonably happy in this life,
And supremely happy with You forever in the next.