You poor thing! These diagnoses suck! Pardon my language.
Listen, there are people all around you with challenges. Everyone handles theirs differently, but most everyone goes through an adjustment period. I think that is where you are. I do believe you will figure this out. Backing off from driving sounds like a good idea until you are stabilized. Things may improve, but over time you will figure out ways to make things easier. My grandmother used to say, "You get used to anything," and I think that is true most of the time.
You are young and medicine gets more advanced every year.
Have you tried acupuncture? I have heard sometimes that helps with narcolepsy. My business involves nutrition and supplementation. I believe many of our "ailments" are directly related to nutritional needs. I would strongly consider a full nutritional evaluation if I were you. Try to find a doctor that believes in "natural" remedies. I'd be happy to recommend a couple of supplements if you would like. There are lots of things you could try.