Good day! There is a site with a blog. 1. Yesterday was published an article (uniq 100%) on the blog and on the same day got into the index google. Result: According to a few key phrases site issued for 2-4 positions. 2. The same day, post it a press release this article into social networks. Today, google does not show my page in search results... finding pointing to ".. title of the article ..." ... is about ~ 800 pages. from various blogs and my page is not there. P / S / practice it regularly such problems did not exist.
This has happened to websites of my customers, this can be so many things such as serp changing or penalty, sometimes it means your url is changing from www. to not
Maybe you repeated too much in the social networks & got hit for duplicate content? How old is your blog?