Galaxy S6 :: Icons Disappeared From Home Page?

I was using my phone earlier, everything was fine. I looked at it later, all my folders and icons are gone from my home page. The only thing on the page are the four things on the bottom. Phone, Chrome, Contacts and apps. I can get to everything from the app drawer, should be a simple matter to repopulate my home page. I've restarted my phone several times. I've both just restarted, and shut down, then restarted. All of my history seems to still be in the apps, I.e my email accts are signed in, my s-health history is there. The only thing that's changed are the icons have vanished from my home page. Phone is bone stock