I'm sorry you have to make this difficult decision. I too had to give up a job that I loved to focus on mental health. However, I keep reminding myself I only gave up that one job in that one moment. It does not define what I am able to do with the rest of my life. There is hope that I can work again when I am ready. There is hope I can find a schedule that can be healthier for me. Just focus on your health for now and trust the rest will fall into place at the right time.