After reading the first sentence of your post I got excited because I thought your story was going to be about reincarnation. Turns out it was about having dinner. Not that it was a bad story. Just not as spooky cool as I thought it was going to be.
once while in the drive thru of a jack In the Box I ordered a supreme croissant which I identified to the bored teenager taking my order as a supreme Kwa-saa. Almost immediately it occurred to me that I have no fucking clue how the French pronounce "croissant". I felt like a Francophonie but the tastiness of the sandwich and the teenagers clear indifference to my clumsy attempt to rise above my linguistic limits soothed my shame.
Your mente seems to get a real workout. Perhaps, due to its constant vigilance in monitoring "the situation", it is misinterpreting, due to the condition of fatigue, the signals your body is sending and in actual point of fact you feel Terrific!