I didn't fall asleep. What's my best course of action?

This'll probably get long, so thank you in advance for reading through it. I'll try to make it as easy to read as possible.

I'm currently a team driver. Three days ago, we ended a much-longer-than-34 hour reset; the truck was in the shop, and we spent several days in the hotel.

Two nights ago, I had a little trouble falling asleep, but that's okay because I slept for an additional two hours passed the time I usually get up to start my shift. In all, I got about seven and a half hours of sleep.

So I got plenty of sleep before starting my shift yesterday. I got up, did my PTI, had breakfast, and started driving. At this point, I'm feeling angry over about a dozen different things, but otherwise fine. Definitely awake.

About fifty minutes of driving later (I was driving in the mountains and monitoring the trip details to keep an eye on my MPG), I started feeling nauseous. I figured it was just my breakfast not sitting well, so I continued driving. A couple minutes later, I started to feel dizzy. Big red flag. So I put my foot on the brake, apply pressure, and immediately black out.

The tractor stopped after drifting about 400 yards away from the lane I started in, stopped by getting caught on a railroad track. Thankfully the only damage was to the tractor, trailer, and a livestock fence. And my face.

I woke up when my head slammed into the steering wheel.

The people in the ambulance checked my blood sugar. It was fine. Blood pressure fine. Got to the hospital. EKG and CAT scan turn out fine as well.

Still felt dizzy and nauseous. Not sure how much of that was from the accident and everything related versus the symptoms felt before blacking out. All I know is I wasn't tired. Not before, and not after. Physically exhausted, sure, but no heavy eyelids or anything suggesting sleepiness.

I'm not sure what happened. I have a few theories (stress and dietary are my main suspects), but I'm not a doctor. I'll talk to one eventually.

The important thing right now is finding out what I should do to protect my license. My insurance with this company isn't valid until the beginning of next month, so I can't use their legal services.

The highway patrolman said, "Any time a driver falls asleep while driving, we cite them for careless driving." So that's what he gave me.

Obviously I need to do everything I can to find the true cause of blacking out, but that's medical. I need legal advice. Do I need to talk to a lawyer from the state of the incident? Can I use anyone? Is there a team anyone has used before and can recommend?

Also, has anyone experienced this, or know someone who has? I don't expect to keep my current employer, though I hope for the best.

Any words of wisdom, advice, or encouragement are welcome.

 

Just got off the phone with the ER that did my blood tests. Negative for carbon monoxide.

I did have my second Moderna dose two Mondays ago, so it wasn't VERY recent, but not exactly "in the past" either.