OK, still don't know what caused it. Some hiccup in the ether I guess. But, for the record, I did find ways to see what I had done in the last few days:
On FTM2012, look in the folder on your computer where media is stored (I have full copies in FTM, not links), sort on date and you can see what was added and when.
On ATM, look in Recent Activity box available on the homepage. You can see some number ? of searches and records that you looked at. Also, in the Tree Pages, Media Gallery the media is in date-added order.
Doesn't get everything I don't think. But if you're like me and you get sidetracked while researching and don't remember every tangent you took, it's a help!