@breewhi
Gosh! Imagine That ... I'm having the same concerns (& I'm 88). Try thinking about it as ... you're experiencing "Mental-Information-Overload"! Take a moment to focus on the enormous amount of knowledge, information, memories, names, skills, Life experiences & trivia you've packed between your ears over the past 70 years! (Your "Hubby" has had an additional 3 years to stockpile) After All, every day of our lives has been a learning experience.
We each have a unique way of retaining it ... sometimes it's stored so remotely - the brain has to go thru it's own unique cataloging system to get to that wee bit of info. (trivial or otherwise) we're searching for.
We Live In a Very Complicated World ... think back to how much simpler life was 50, &/or 100 years ago.
Chin Up breewhi, a LOT of us share the same concerns ... (ask your friends, Bet'cha most of them have the same concerns)!