Hmmm... This is a difficult situation. In my opinion, mental health is just as important as physical health. No qualification is worth risking your life or wellbeing. However, I will say that Oxford is a prestigious university and you must have significant ability to be a student there in the first place. You also mention that you can't do an essay-based degree, which I find odd because History, Politics and German are all qualitative subjects. If I were you, I'd go to the pastoral care team and tell them you're having a mental health crisis and that you need to change courses and also take some time out. However, when you're away, you need to really think about why this choice hasn't worked out so you can learn from it and make better decisions in the future. For example, if you start to feel that the culture at Oxford is incompatible with who you are as a person, it may not be worth returning at all and looking at other Universities. If you'd rather do an advanced apprenticeship than conventional education, that's also something worth researching. Above all, please don't listen to what other people say about it or feel like you've failed. A lot of people who seem to be doing well and following the 'correct' path after school end up significantly underachieving in the long run. The education system is pretty flawed and if you want to escape, even temporarily, no one blames you for it!