Asking for disability ?

I have a history of 2 pelvic breaks, herniated discs, and 2 broken vertebrae. I have tried PT, but it's been really painful to walk. Yesterday the doctor said I have pubic symphysis diastasis at 30 weeks pregnant. When I asked about disablitiy, they made an appointment with a spine doctor. So basically this appointment is to see if he will put me on disability? Do I just go in and ask him?