I just updated my site with a new blog post and was able to see it successfully in a new window. I closed all my windows and then worked on some other sites (Eventbite, Mailchimp) to finalize some event planning work. When I opened a new window to visit my site again, I got the "Error establishing a database connection". I opened another browser to check the site and got the same message. When I tried to access the login page for WordPress Admin, I got the same message. I have read other posts about this error message, but they are beyond my area of expertise. I don't understand how this could happen since I was just working on the site moments ago without issue. Any suggestions would be much appreciated.