Doesn't sound childish at all, Davey. Those dreams came seem more real than life itself sometimes. Every sense can heightened, sharpened. I even dreamed scents or smells. FREAKY!
I still, at times, have problems sleeping and just as I'm falling off to sleep I'll be jolted awake by this feeling of impending doom. I HATE IT and when that happens it makes it hard to want to try and go back to sleep for fear of it happening again.
Sorry you're going through this.