Hi Relinabreu,
Please perform the following steps to help narrow down this issue:
1.Type "Documents" in the search box on the top right corner of this site and search it. on the next search result page. check if there is your team site - Documents.
2.Access the Document library via the URL directly: YourteamsiteURL/Shared%20Documents/Forms/AllItems.aspx
3.Open your team site using SharePoint designer 2013 -> under lists and libraries, check if you can see the documents library.
Note: you can download SharePoint designer 2013 here and see how to open sites using designer With this video: https://www.youtube.com/watch?v=gw-P-4YR6dw if you are not familiar with it.
Disclaimer: Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology.
Thanks,
Sky Pei