Solved
I saved one of my resources as one to be shared with a link on accident, and I never attached it to a public post. However, I cannot set it to be private, no matter what I try. Also, when I open it, it visibly signs me out in the top right corner. When I try to log in with google, it just sends me to a blank page (on the popup window). Is there any way I can make it private?
The same problem 
Click the three dots icon on your material's thumbnail (bottom right), select Details in the displayed menu.
The Details page opens. Click the Access Settings button and select Private from the Visibility drop down list.
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