WordPress 4.9.3 was released on February 5 and included several bugfixes. The next day, WordPress 4.9.4 was released to fix a "severe bug" in the previous day's bugfix. If your WordPress website was automatically updated to version 4.9.3, you must manually update your website to version 4.9.4, otherwise your website will never automatically update again. If you don't know how to do that, it's time to call your webhost or developer! And you may have to part with some of your hard-earned money!
However… if your website was developed and maintained by All-In Web Services, your website was updated within a few hours after these WordPress maintenance releases rolled out. We've got you covered! And we will continue to keep your website running the latest, most secure version of WordPress.
Wordfence has more information here.