I made a few dozen points as a Feature Class on a map, adding copious notes in the attribute table. I did this with about 10 maps housed within my project. I saved the project I don't know how many dozens of times. Now when I re-open the project, the points in the feature class are nowhere to be found, and the attribute tables are ALL empty! What gives, why would this not be saved? I spent a full week making this project, now I can't refer to my work.
Attached below are two pictures: the first has the field with all the points from the feature class present; the second picture is a screenshot of the field with the feature class checked, but points nonexistent and the attribute table empty.