For point #4 (about sleep) and point #5 (about delusions) - these are probably related. If you don't get enough sleep you get rather paranoid. Having been in t

For point #4 (about sleep) and point #5 (about delusions) - these are probably related. If you don't get enough sleep you get rather paranoid. Having been in the ICU with various family members I notice they check on you A LOT and that often will wake you up. This lack of consistent sleep (either from injury, illness or checks) make people rather paranoid. Further, sitting still and waiting often makes people a bit stir crazy.