I took 4 days off work to destress and get my head back on. I feel you there.

Maybe you could try to record a happy memory each day. Like was the weather nice, one time your kids or wife smiled, when you laughed absolutely anything, if someone was nice to you etc.

Then when stuff gets to you you can read these or look at a picture and immerse yourself in that one small moment of enjoyment or relaxation. Re live that happy moment in your head.

It may not fix your entire day but at least in that one small moment you are thinking of something good.