White duvet cover with navy piping, monogrammed PP

I lost my white queen-size duvet cover set yesterday around 4pm near the Starbucks on Broadway in Columbia. It's a 100% cotton duvet cover from CozyNest with navy piping along the edges; the zipper still works but the fabric shows a few tiny pills from wear. The corner has a small silver monogram 'PP', and there’s a faint coffee stain on the backside from a late-night spill. This set was a gift from my grandmother and means a lot to me; I’d really appreciate it being found and returned.