On one of my practice ILS', I experienced SEVERE disorientation on the missed. I could see a couple of spits of land with lights on them, jutting out into the Gulf. This gave me enough to make me feel I was far too noseup, and I just wanted to dive.
It pretty much can take everything you have to trust the instruments, and being tired would only make it harder.
It's hard to imagine unless you have had it bad like that. Mild leans was pretty normal for me, especially as my training included some late steepish turns onto localisers.