"All My Files" under other

So my Mac is really messed up and I'm trying to fix everything. I have this one problem where nothing seems to work. I don't go to forums unless I am extremely frustrated (very rare) and that is now. What has happened is that first of all, in Finder, every single file is on my disk is classified under the "Other" section, when I go to about this Mac, it shows only a fraction of my disk is actually "Other". I have tried clearing the NVRAM and PVRAM crap. I've tried rebooting, deleting the Finder preferences. Also, are their any other known symptoms that occur with this problem?