I think that, to a large degree, most of us have experienced some kind of awkwardness in public that sticks with us later, from getting words mixed up or getting people's names wrong to trailing off instead of finishing a sentence.
It happens. Social anxiety makes you do some weird stuff sometimes. When your brain gets all flustered, it can't come up with the answers you need on the spot.
But, if one of those things that keeps you up at night happened to you, you can rest assured you're not alone. Check out all this sublimely cringey social awkwardness shared by some brave, anxious folks on Reddit.