I'm currently on my 2nd time trying for SSDI. The first time I didn't use a lawyer, never received most of the paperwork, and SS didn't receive basically any of my documentation from hospitals or doctors. I also opted out of seeing a doctor they wanted me to have an evaluation with because I thought they could get documentation from the doctor/therapist I was already seeing. They didn't care about me missing work due to treatment, because in their eyes I was still functional.