Lost my Thief gear after switching vocations — any way to get it back? 😭

Hey everyone,
I think I must’ve sold my Thief gear by accident, but I have no memory of doing so.

I mainly play as a Thief, but I switched to Sorcerer for about 10 hours. When I changed back to Thief, all my Thief gear was gone — including my Gazer’s Hood and other stuff.

Is there any way to get it back? Or am I just out of luck? :(