in my own experience (with my wife's chronic condition), most doctors are extremely dismissive if they don't have the answer off-hand. I don't know why this is - but reactions ranged from saying she was lying or was addicted to painkillers (despite not asking for painkillers) to switching back and forth between two common diagnoses even though they were quite clearly inaccurate. I have no faith in the front-line medical system to be able to deal with anything less blatant than a broken bone or a flu, if only due to what appears to be doctors' near-universal refusal to respond to uncertainty with humility and curiosity.