You have a chronic illness. You go to the doctor with your list of symptoms, but you're told that there is no more time and are then asked to book another appointment.
Your energy is already depleted and you you don't know how you're going to drag yourself to another appointment.
Book a double appointment in order to max out on your time and energy and ensure that you are respecting the doctor's time and that of the other patients, as well. It's a lot less stressful for all concerned.