Did you end up going back to Pinterest to find them or did you just have it in your head after pinning it? The entire attribution of a pin to a purchase in a store is tough if there's no obvious path from Pinterest to the retailer.
I usually go back to Pinterest to find the specific thing, and sometimes I'm directly browsing through my pins while trying to think of a gift. But it's a leaky system of course; for example, sometimes I've pinned a Flickr photo of the thing instead of an image linked to a website that sells the thing.
