Queen-size cream duvet cover with embroidery

I lost my queen-size cream duvet cover from a LuxWeave set yesterday around 3pm. It's a cream quilted duvet cover with subtle silver embroidery and a tiny monogram 'AP' stitched in the inner corner. The fabric is soft cotton and in good condition, except for a small coffee stain along the bottom edge from last week. I think I left it near Campus Martius Park by Woodward Ave in Detroit Metro after I ducked into a cafe for a moment. It means a lot to me—this was a gift from my grandmother—and I’d really appreciate getting it back.