Jocelyn, I love your comments, always so smart and so gentle.
I will address this at some point, but as my spouse points out, right now it's just a phrase thrown in my after-visit notes, not a diagnosis, which does make a difference.
Mostly I was annoyed from a wordsmith point of view, that I did this interaction wrong. I was trying to use "introvert" to highlight that I just don't like most social interactions, rather than they make me anxious. Also, my poor mom being stuck in a Care Home didn't so much make me anxious--anxiety to me always seems like something a person is fearing, or is nervous about because they think they should be able to fix it--as it made me desperately, existentially sad, and that is a different problem than "social anxiety."
And thank you for the tip about a snail mail letter--god knows there's other inaccuracies in my chart I could work on fixing and that might be the way to do it!
peace and serenity right back at you--and thank you for reading and understanding.