I will certainly offer my 2 cents, but please know that I am simply another PWN (person with narcolepsy) and have NO medical training. Unless the doctor who ordered the polysomnogram (PSG) and the multiple sleep latency test (MSLT) is a certified sleep physician, I would encourage you to make an appointment with one, particularly if you can find a neurologist who specializes in sleep.
They said heart rate was fine. They look high to me. They didn't explain what the whole CO2 means so I guess it is all good. Can anyone explain?
While 123 BPM (and even 115 BPM) do seem to look high, I would guess that you have nothing to worry about. For your heart rate and the carbon dioxide levels (and your oxygen level for that matter), the levels are tracked during the PSG to look for obstructive sleep apnea (OSA). Your CO2 levels look just fine. Basically, you had a "high" CO2 level for less than one percent of your sleep time. Basically, it IS all good.
For the nap test they just said medication will probably help with the fatigue during the day. Does this results mean I have narcolepsy?
From what I understand, your PSG would definitely indicate sleep issues (got LOVE an arousal index of 13 per hour - basically that means that your sleep is like someone pokes you every 4-5 minutes causing you to stir). Your MSLT (a flawed, but revered, test) would strongly indicate narcolepsy. My sleep doctor would say, "it's a slam dunk." Most sleep doctors would give a diagnosis of narcolepsy with REM in only 2 of the 5 naps. Since you had it in 4 of 5 AND your longest latency was below 5 minutes, even a conservative sleep doctor would likely swear that it is narcolepsy.
Do you experience cataplexy at all? If not (or even if it is minor or infrequent), you are probably narcolepsy without cataplexy (which is my diagnosis). If you do experience clear muscle weakness as a result of emotional triggers (which is what cataplexy is), you are then narcolepsy with cataplexy - approximately 70% of PWNs are narcolepsy with cataplexy.
As for medication, stimulants and/or arousal medication (Provigil and NuVigil) will definitely help with the excessive daytime sleepiness, but a good sleep doctor would likely discuss night time meds too. Many PWNs take something at night to help get some deep wave sleep (the primary cause of excessive daytime sleepiness for PWNs is the fact that we get little to no deep wave sleep). Since it seems to be a brain injury that has caused the onset of your narcolepsy, it is likely that only some of the hypocretin producing cells in your hypothalamus were destroyed. Nonetheless, standard treatment for narcolepsy (with OR without catplexy) is Provigil and Xyrem. Unfortunately, many doctors seem to distrust Xyrem, and PWNs all seem to react differently to all of the meds used to manage narcolepsy. Some PWNs only need Xyrem (which is a MASSIVE depressant and is taken at night). Others function great with just Provigil. I, however, need Xyrem and a stimulant. Although Provigil works great for many PWNs, it caused me extreme anxiety (and extreme weight loss). Ironically, I experience far less anxiety with amphetamine.
I hope my comments help. PLEASE feel free to ask more questions. In my opinion the toughest thing about narcolepsy is that few doctors understand it. As a result, most PWNs only get the run around from docs. It is only fellow PWNs who provide tangible answers and who help remind us that we are not insane.