Those 12 hour shifts are tough. I hope your cpap catches up with you so you won't be falling asleep. As for the lucid dreams- I envy you, been trying to have them for years. Still the time mess up does not sound comfortable. Are you having lucid dreams during your regular sleep time? Is there such a thing as a sleep psychologist?
Sounds like you work the crazy hours my hubby does!!! He often works 80 to 100 hours per week. Check stubs can verify this.
He doesn't have the dreaming you do though -- it is me that experiences these "weird" dreams. I am really tired the next day and blame it when it happens on the dreams. The dreams don't necessarily expand time, just really active and vivid. I remember them when I wake up. I have wondered what a dream analysis would show :).
Thankfully I don't have them but 2 or 3 times a week. :)