My SIms 4 save files keep disappearing

@Simslovergirl114  Did you try loading a backup save, to see whether the households are there?  Households do seem to disappear from saves sometimes, and lots can disappear too, for reasons that are not always clear.  But loading a backup save often helps.  And if you don't want to lose a lot of progress, you can try saving the affected households to the library and placing them in the most recent version of the save, that is, if the households are present in an earlier version of the same save.