Is this like, a penance thing? Or is this the first time you've found out you were wrong about something? Because I guarantee you, no one learned about this and thought, "man I bet that sgibson5150 person really feels like a boob right now!"

You’ll worry less about what people think about you when you realize how seldom they do.

You'll find out you were wrong again. If you're doing it right, it'll be a daily occurrence. If you learned you caused harm in the past, it's probably good to go back and try to make reparations. Otherwise, just be humbled and move on.