Cream duvet cover with blue floral pattern

I lost my cream Brooklinen queen-size duvet cover with a subtle blue floral print yesterday around 3pm. It's 100% cotton and has a neat pearl-button closure along the bottom edge. There's a small monogram 'PR' in light gray stitched into the inner corner. I last remember it on the guest bed in my apartment on Court Street near the Main Library in Sioux City. It was a gift from my grandmother, and it feels sentimental to me; I’d really appreciate getting it back.