Yes, get to a doctor! If you don't sleep, your driving will suffer to the point that it is worse then drinking.
Mine was fibromylgia -sorry about spelling.I had sleep debravation. I was falling asleep at the wheel, at the cmputer you name it - until I was diagnosed.
I now take a 1/2 sleeping pill, now I sleep through the night.
I am happy when I wake up and lots of energy.
Sleep is important.