Did i miss something? Isn't it supposed to keep your /home folders intact when you upgrade?
Is there some way to retrieve what was there?
Open up terminal type
If something is hidden, -lFa option will display everything.
Check /etc/passwd file by
find the line of your user name. In the same line of your user name, It will show /home/something that's the place your previous stuff is located.
Open up nautilus (File Manager) press
type the location you found in /etc/passwd file