Hi Andee,
Regarding the lost work, Google Drive gives the user the ability to see the version history of any document. Right click on the file in Google Drive and then click on “Manage Versions”. You may be able to figure out whether the document was ever updated yesterday. One possible explanation for the disappearance of your work is that two copies of the document were open, somehow. If this happens the last version to update wins. The “manage versions” history may help with this.
Jonathan Sandoe