I initially thought about sharing this about stress and didn't, but then I read your post.

That's how I learned I was stressed while working. I have a Garmin watch and everyday I get an alert telling me I had a stressful day.

During the day if I do a little check-in where I observe how I feel, I often notice a lot of muscle tension, especially in the plexus area, and that I stop breathing for extended periods of time. I try to consciously relax, which would work for a few minutes before the tension comes again. I end up being exhausted almost everyday. My watch has been telling me I'm either in "recovery" or "strained" for months.

Stress can be difficult to notice, especially when you're stressed.