It’s called “buyer’s remorse.”
WikiPedia describes it this way: “Buyer’s remorse is the sense of regret after having made a purchase. It is frequently associated with the purchase of an expensive item such as a car or house. It may stem from fear of making the wrong choice, guilt over extravagance, or a suspicion of having been overly influenced by the seller.
“Buyer’s remorse is thought to stem from cognitive dissonance, specifically post-decision dissonance, that arises when a person must make a difficult decision, such as a heavily invested purchase between two similarly appealing alternatives. Factors that affect buyer’s remorse include resources invested, the involvement of the purchaser, whether the purchase is compatible with the purchaser’s goals, and what positive or negative evidence the purchaser encounters post-purchase that confirms or denies the purchase as a good idea.
Buyer’s remorse can appear following an important decision.
So now some days following the “Brexit” vote (“The Brexit, an abbreviation of ‘British exit’ that mirrors the term Grexit, refers to the possibility of Britain’s withdrawal from the European Union.” – a google narrative), more than a few are feeling it. Read this New York Times article before you vote the next time!