Hi #Jen this is happening much too often at the moment, most likely, you are logged into a temporary account . . .
Before you do anything or move any files around
Restart (not shut down) your PC 4 times, each time let your PC get to the Desktop before the next restart, this will fix this issue a lot of the time . ..
Otherwise:
Please open Windows File Explorer
Navigate to C:\Users
Do you see two user folders that look like yours?
Open those folders and check inside Pictures, Documents . . . etc. and see if your files are there
If your files are there:
Create a new user profile with Admin privileges
Log into the new user profile
Copy all your data from the old profile to the new profile (Documents Library, Pictures Library . . . etc.)
If you still have not found your files, look for a Windows.old folder on your C Drive, expand that to open the users folder contained inside - check there for your files, icons . . .etc.
If you do find your files . . . etc. there, copy them out as soon as possible as Windows will remove the Windows.old folder in time
NOTE VERY IMPORTANT: Do Not copy your files into the Temporary profile you are currently in, when the situation is corrected, your files will be deleted with the Temporary Profile and will not be recoverable !!