Is there a way to get it back?

Edited to add, I keep trying to edit the title.

You open up your shop, search for the item and on the very right side either choose "all" respectively the number you want to remove. At the bottom of the shop page it'll automatically display destination "Inventory", you can choose any other place, though, and you press the "update items" button.

Or you choose "account search" from "personal" drop down at the top of the page, type in the item and at the result click "Remove One"

Thanks!