I am afraid you are right that I may have lost everything. I didn't have Evernote on my Desktop, only my Android device. However, it does say it syncs every 8 hours. I have put a ticket into to Support with Evernote. They asked for an activity log which I sent them. No reply yet, but I see the hours are 7 am to 7pm PST. Will hopefully hear today.
I chose Sign Out and I thought I was signing out of Evernote App. The message came up Signing out will remove your cached note and online Notebooks from your device. Do you want to sign out? Chose YES to sign out. Said 11 .....??? (Probably Notebooks). I looked in Trash and it says 0. Does anyone know any way to retrieve these Notebooks. Evernote seems like a whole new program with nothing in it now. These are VERY important note that I REALLY need to retrieve. I would really appreciate anyone's help.