The purpose of headlines is to:
In short, headlines are primarily an ad for the article. If you only read the headline, that's like only reading an ad and thinking you know how well the product actually works*. (BTW, the author of a news article rarely writes the headline. Headline writers do that. Blame them, not journalists, for misleading headlines.)
*The Chevrolet Vega won awards when it was released in 1970, but body and engine problems plagued it until it was discontinued in 1977, and it is on many lists of worst car of all time. Was this advertisement "fake news"?
Many people are sure that stories of concern to them aren't being covered adequately or fairly in the "mainstream" news, and seek out "alternative" sources. It's always a good idea to check multiple sources, and there are certainly instances of big, traditional news outlets not covering a developing story. However, there are many non-political reasons that a news outlet wouldn't cover a story, e.g., they might:
If in 24 hours major outlets still aren't covering a story, there is often (but not always!) a good reason. If you must post a dubious story, please frame it with a caution, e.g.: "This looks interesting, but I haven't confirmed it elsewhere."