Hi Whitney,
Just to introduce myself: I'm a former neuro nurse who's had sleep paralysis (SP) for more than 50 years, so I know a little bit about the subject from both sides.
I'll deal with the easiest point first - your feeling that you've been lying awake with your eyes closed all night, only to discover in the morning that you've been asleep. This is quite a common one, and as far as I know it's not connected with SP. It's usually the result of getting a bit anxious about whether or not one is getting enough sleep, and is especially common in younger people. It's completely harmless. Google sleep state misperception if you want to, but don't get too hung up about it. You need to focus your attention on the real problem - i.e. your difficulty staying awake while driving.
I can't diagnose you, obviously, but it does sound as if you could have narcolepsy, possibly associated with sleep apnoea. They do sometimes occur together, and SP can occur with both of them. You need to see a doctor about this, and try to get yourself to a sleep clinic. Ideally you shouldn't be driving until this has been resolved either. Once diagnosed, obstructive sleep apnoea can be managed by using a CPAP machine when sleeping. Narcolepsy can be treated with medication, usually Ritalin, which is an amphetamine. However, please don't try to get hold of this medication on-line, without a prescription. It should only ever be taken for narcolepsy (or, paradoxically, for ADHD) and there's the additional risk when buying it on-line that it could have been mixed with much more dangerous, addictive amphetamines. Too many young people have died from swallowing stuff without really knowing what was in it. I wasn't even going to tell you the name of the drug, but then I realised you were bright enough to look it up for yourself, so I wanted to address this.
The narcolepsy/SP connection is not automatic, however. While most narcolepsy sufferers experience SP, the converse isn't true. The majority of those of us who have SP don't have narcolepsy. The third arm of the narcolepsy syndrome is cataplexy, though again, not all narcolepsy sufferers experience this. Not to be confused with catalepsy, which occurs in schizoid states. Cataplexy is when the person momentarily becomes paralysed in waking life and slumps to the ground. It's most likely to happen in moments of emotion, especially laughing. I'm just wondering whether you've had any episodes of this kind, though their absence wouldn't necessarily mean you don't have narcolepsy. This can only be diagnosed, or eliminated, in a sleep lab.
From here on, it gets even more complicated. There's another condition, known as hypersomnia, which is a definite symptom of obstructive sleep apnoea, and may or may not be a minor form of narcolepsy - with or without apnoea. Medical opinion has been switching back and forth over this one for decades, and to be honest I'm not sure where it stands right now. For what it's worth, I firmly believe there's a connection, but I'm not a doctor, only a sufferer. If you manage to get a sleep study, and if it turns out you have hypersomnia without apnoea, I'm afraid it will depend entirely on the views of your doctor as to whether you can be treated for it.
My reason for saying this is that narcolepsy is strongly hereditary - though like all these conditions, it has to start somewhere. It might be worth asking around in your family, though I know only too well from personal experience that it's hushed up in some families (like mine!) for fear that the hallucinations of SP are a sign of mental illness. (They're not, of course.) I've suffered from hypersomnia all my life, even from early childhood, and started getting SP with severe hallucinations in my early 20s. I've had both ever since. My father manifestly had hypersomnia too - he twice fell asleep riding his bike - and it was only 20 years on from the onset of my own SP that he finally told me he'd always had it too, with even worse hallucinations. His mother and at least one of his siblings also had the hypersomnia/SP combination, which makes me wonder whether we all had a minor form of narcolepsy.
To muddy the waters further, it's entirely possible in the case of the hypersomnia/SP sufferers in my family that we all had sleep apnoea, as we'd all inherited my grandmother's somewhat squat, thick-necked build. Certainly my father was a heroic snorer, thought that doesn't necessarily go hand-in-hand with sleep apnoea either. None of us ever got to a sleep lab, so we'll never know. Such things barely existed in my father's generation, and not at all in my grandmother's time. And I've never been able to get a referral because of the persistent (and erroneous) view of most doctors that obstructive sleep apnoea can't occur in women.
I'm sorry if this post has been long and somewhat rambling, but I thought it important that you should understand all the possibilities and combinations thereof. The bottom line is that you need to be seen in a sleep lab to find out exactly what's going on. I'd be interested to hear how you get on. You can post here or send me a private message if you want to. Click on the little envelope icon next to my name. PMs via this site don't reveal the email address of either party, or carry viruses.