How Is Narcolepsy Diagnosed?

How is narcoleptsy diagnosed? I have had two episodes in the past three years where I have fell out. one was talking to my wife and I passed out and hit my head hard on the asphalt. I was unconscious for ten mins. I had a concussion from the fall. The next one was 7-14-17. Car wreck. I passed out driving. my wife was hurt pretty badly in the crash. I am scheduled for an EEG 8-1-17. Can this be controlled with meds.? Will I be able to drive again reliably? I have to be able to drive for my job. I do not have diabetes. I had a healthy me check up after the wreck. blood work done, and everything was fine. normal blood pressure. no problems. my family doctor ordered the EEG and said I may be narcoleptic, or be having seizures. I don t know which is better or worst. any advice would be greatly appreciated.