"If my labs are normal, I'm fine." Normal is a population range, not YOUR target. You can be technically "in range" and practically half of yourself — especially if your own level has drifted down for years and nobody ever compared. The fix isn't panic, and it isn't self-diagnosis. It's lab literacy. Course 3 in the Classroom (Know Your Labs) unlocks at Level 2 — engage in the feed and it's yours.