Previous episodes of ‘unmasking’?

Earlier in my life, I had 2 episodes of brain fog, unrefreshing sleep, and fatigue for a few months and then it would magically disappear.

I am now just finding out that that those episodes were my body unmasking my CCI and then my body went back to compensating for it. Anyone else have similar events?

I also wonder when my body went back to compensating for it, and I had no symptoms, if my systems were impaired even so slightly.