I know how it sounds, but I double-checked: I was working on something new in an existing project, with 2 new collections and a form (page), but everything is gone, really gone.
Also, I added some fields to an existing collection. Those were still there, but in Data Manager, the labels were all between square brackets [ ]. When I clicked on them, it suddenly said "Define" and I had to re-define the field specs.
Has Wix had any trouble lately with the DB and put an older backup back? Is there any way I can recuperate the missing parts? Collections were named "Events", "EventDetails", page was called "Eventos".