According to Choosing Therapy, a "vulnerability hangover" — a term actually coined by Brené Brown — is the uncomfortable feeling you get after sharing your innermost thoughts and feelings with someone else. Just like the morning after a night of overindulging in margaritas and vodka sodas, a vulnerability hangover can leave you feeling emotionally and even physically off after baring your soul.

This reaction may be rooted in a fear of rejection, similar to social anxiety, and you may notice yourself worrying about the aftermath of your vulnerability. "We may think, 'Is that person now going to think less of me? Did I display a weakness? Am I safe?'" Dr. Emma Seppala, science director of the Center for Compassion and Altruism Research and Education at Stanford University and author of "The Happiness Track," explained to The New York Times. 

Long after you overshared at dinner or were a smidge too honest with your boss, your brain may continue to fixate on what happened. And even though this hangover (probably) has nothing to do with downing too many cocktails, you might notice some shame and regret after emotionally exposing yourself, similar to if you had acted out of character while intoxicated.