my wordpress website literally just disappeared

I just logged on to edit some content on my website. signed in per the norm – “www.xxxxxxx.com/wp-admin” got on and clicked tab to edit sight. I began adjusting minor things like background colors, title tag etc. Then I clicked on customize website, and its disappeared, gone. Can’t log back on, content is blank, everywhere. My website literally disappeared. I can type the url in and a blank pages come up. Tried to restart my computer but the website and log on are blank on IPAD and phone too. HELP