Why won't my files show up in Google Drive?

Lately I can't find my files in Google Drive. I will create a document or folder, put it in GD, but when I search for it it's not there (either from my home computer I just used, or from a remote location.) Yet if I try to resend something to GD, it will tell me "This file is already here."
I can't figure this out.....it happens with IE and also with Google Chrome.

Any ideas?