Dreaming, while having a fever
When we have a fever, it is difficult to sleep peacefully. Much worse is trying to dream. When I have a fever, a lot of abstract things pass through my mind: i see numbers appear and disappear, i see lines od all shapes and sizes, images that move too fast... Even when I wake up, this images won't stop. Sometimes I do not know if I'm awake, if i'm dreaming or hallucinating. It is very difficult to relax and concentrate. I think this happens to you too.
And what about lucid dreaming? In this state should be impossible to have lucid dreams. Did you have LD's while in fever? How was it?