News Hangover 

The 24-48 hours after a major event where there is not a lot of news to talk about.

Today was a news hangover so we didn't have a lot to talk about in government.

News Hangover by Staercke.Alex October 5, 2017

newshangover 

The tired and depressed feeling a person has after watching too much bad or discouraging news on television or the internet.

Graham had a "newshangover" after watching a few hours of CNBC covering the declining stock market. It dropped 300 points that day.

newshangover by John Wordsleuth March 6, 2009