Work is a psychologicall rich topic, related to self-worth and livelihood. The work situation could be problematic and you might sense something happening behind the scenes. Trust your feeling.
I had fight similar issues. My excuse to stand up is to eat something. Guess how thin I am… Luckily I changed a lot, it was an 8 year long journey which still ongoing. For me what helped is experimenting, e.g. do some small „crime“ -> experience the lack of arising problem / or that the issue can solved. If you never try just fear, The fear just grows.
For me it was especially hard to accept that I just need sometimes to stare out of the window or draw some graphs by hand, which then ends in the bin. So seemingly unproductive stuff… But in reality this is productive, my brain is working and try to process the topic. Furthermore even just an ordinary discussion with some friend can fire the aha moment.
I've come to believe this anxiety actually stems from high school, where teachers would constantly demand punctuality, full focus and productivity. It was an environment where glancing out of the window could get you yelled at. Years later, I still seem to carry that sense of being constantly on edge, that someone is watching, judging.