Cream quilted duvet cover with navy piping

I lost my cream quilted duvet cover with navy piping yesterday around 3pm near the Broad Street Market on Market Street in downtown Harrisburg. It's a Queen size duvet cover from Pottery Barn, 100% cotton sateen, with a subtle navy piping along the edges. There's a tiny monogram 'AH' stitched in the lower-right corner and a faint coffee stain on the inner seam. It was a wedding gift from my grandmother and really means a lot to me to get it back.