I am so sorry that you are in pain. I have a job that has a lot of responsibility with it and I was very worried about taking time off for surgery, chemo and radiation, but someone said something really great to me. "Your only job right now is focusing on getting well and beating cancer". That really helped me give myself permission to listen to my body and what it needed to get through treatment. Some days I felt like maybe I could be at work, some days, not so much. Focus on you and your health. The mortgage company will be fine and your leave should be covered under FMLA (Family Medical Leave Act). Best of luck and keep in touch.