I work in a very stressful workplace with the same types of stress (e.g. constant changes in direction, client commitments made without checking with the staff

I work in a very stressful workplace with the same types of stress (e.g. constant changes in direction, client commitments made without checking with the staff who will deliver, etc). Unfortunately, the root cause of these problems lies with the company leadership which makes them exceedingly difficult, if not impossible, to correct. The only way to remove this type of stress is to leave for another company. As you seek a new job, be open with prospective employers about the reasons you are looking, and prepare questions to verify that you're next employer doesn't have the same problems. I wish you luck -- these circumstances are ver difficult, and they can destroy your health. Run, don't walk away.