I wonder if someone can help me figure out what happened to my map?

I have been creating a set of map layers relating to an archaeology project that I am in the final stages of writing up -- e.g. I'm doing the last bits of edits, including formatting and finalizing some of the maps that I will export to include as illustrations in the book.

Suddenly, there are green symbols showing up on the map, that I did not put there!  Some of them are in the same location as point  features i want showing on the map, but the symbols for those features are underlying the green symbol.  Some of them, when I click to identify, return a location, but no data, 

I have turned off all the layers except the one I want showing.  

The only other thing that happened is that yesterday appeared a map file that said it was _"808b2964960a787061c7c92379303246_Short-SavingShapefilesandUploading"   I did not download that, and don't know where it came from.  But I deleted it, and still, green dots...

Does this make sense to anyone?  Any help would be very gratefully welcome!

Amy Gazin-Schwartz