Go to the set and select "Edit this set", located in grey highlights to the right of your set. After you've added it you publish the set the same as if it were new. :) @inamack
Hey there Ina! No questions are stupid! Ask away and always ask. :)
Is this your bracelet? http://www.polyvore.com/pyramid_stretch_bracelet/thing?id=53407275
If you know the name of the Jcrew item you're looking for, go to Google and search on "polyvore item name jcrew". Some items were not saved in polyvore under their Jcrew name, and can be harder to locate. For the most part, I think most items can be located, and if not, you can always post a set and ask for help from the jca community on polyvore. @inamack