or you have developed a bad habit of always making someone repeat.
My dad would do this. You tell him something, and he'd automatically say, "What?" And then, as you started to repeat yourself, he'd realize that he had heard you right the first time and respond accordingly.
Anxiety can definitely mess with comprehension/memory. The brain's distracted and can only do so much, after-all.
I'd recommend staying off Google, if you can, especially as it relates to health issues.