The best explanation? One can use the phrase a way to lighten a highly-strung situation by calling attention to other stuff by pointing out that other things are also going on. Even if those other details are less eventful or crucial in the moment. Though that is not the obvious purpose for the phrase, but that happens with other sayings out there.

Sorry that I confused you. :S

And I have agreed with everyone here about OP not contacting the doctor as he wrote everything would be handled without ever needing to call or email him again. And yes, he could take legal action against her.