MSFinals-5399

A 30-year-old woman visits her GP complaining of feeling down. She finds it difficult to work with her colleagues and believes they are not performing up to par. Consequently, she declines to delegate tasks and has become exhausted.
Upon further inquiry, she adheres to a strict daily routine and tries to avoid deviating from it as much as possible. If she fails to follow this plan, she becomes anxious and spends her free time catching up on tasks.
What is the most suitable course of action in managing her probable diagnosis?