I'm currently in a project management consulting role that has turned out to be a nightmare. After a series of unfortunate events in the past few years, I recently reconnected with a Director from a previous job who offered me a position on his lean team. He mentioned a secondment into a client role, which I was familiar with in my industry. However, upon starting, I discovered that this was not a secondment at all; the company seems to be acting as a shadow employer for the client. My contracted hours are supposed to be 37.5 per week, but the client is expecting me to work 10-12 hours a day, five days a week, even though they don’t require their own employees to be present as often. The Director who brought me in is no longer at the client office, and I've noticed many colleagues leaving. My employer insists that we only log 37.5 hours, despite the overwhelming workload. This situation is taking a serious toll on my mental health. I have a history of generalized anxiety disorder and panic disorder, which I managed well until this job. Now, I'm struggling to sleep, exercise, or maintain any semblance of a healthy lifestyle because I'm working so many hours. I've reached out to my network to find another role, but I feel like a failure for having made this move in the first place. I'm worried about my health and how long it will take to recover from this experience. I've considered speaking to my GP about the stress, as I know they can sign me off for medical leave, but I'm hesitant to do so because I can't afford to be out of work with a mortgage and debt hanging over me. I'm at a loss and would appreciate any advice on how to navigate this situation. What should I do next?