I can relate this this. I had such a fewer 3 weeks ago. I experienced high fever and my dream was symmetrical and geometrical.

I had just returned from a trip in Asia and got a really bad infection just after returning. My fever was high and I was bathing in perspiration during the night. I had a terrible and painful night.

So my dream was that I was captured by Recep Tayyip Erdoğan in Turkey and couldn't go back to my home country. I was captured with thousands of other people and we were all laying in our floating coffins in Bosphorus strait. I could see this pattern with thousands of thousands of floating coffins aligned in a perfect symmetrical pattern. I was trapped there forever and I would never get away from it.

Luckily I was brought to hospital the next morning and got hydrated and given some antibiotics.

Not sure if I want to experience such a night again and I'm so happy that we live in the times of antibiotics. Imagine the painful dreams of the humans that live in a time without working antibiotics or access to good hospitals. and need to stay in the void for a long time.