There will inevitably be some elements of work that you cannot change. But there are many you can. For longer-term stress relief, it would be sensible to reflect on whether you tend to agree to extra work too readily and how you manage your time, delegate, solve problems, set goals and deal with colleagues. In the short term, as immediate stress-busting solutions, there are simple things to practise. We are not the victims we think we are.
Some people get a kick from having a problem.