I can very much relate to this. I have tended to always be someone that pays attention to these minor details. To me, it is absolutely insane that people don't remember or internalize how they feel regularly. For example, I can tell you with ease that I had a long string of extreme productivity and focus in March lasting until the middle of April which dipped during May and is now peaking again. I can tell you what I believe to have caused it and what also ruined it. Productivity, Energy, sleep quality and overall mood are things I think about daily.

For me developing this skill was a necessity after I encountered frequent headaches from eating and drinking the "wrong" things. I was basically forced to take my awareness of general overall wellbeing up a notch to really figure out what was causing them. Noticing small signs became important to prevent being sidelined from life with a nasty headache.

I have it down pretty well now and there are certain very small, but distinct, signals and feelings that tell me when headaches are coming so I can work to prevent them.

Anecdotal, but I've talked to lots of acquaintances about this and no one seems to understand what I'm talking about. I've also been meditating for 4+ years perhaps that adds to the heightened awareness.

I don't want to say that people are "unconscious" but is sad that many are missing out on a more nuanced experience of life.