Blue whale enamel pin lost near Bubblegum Alley

I lost my blue whale enamel pin yesterday around 4:15pm near Bubblegum Alley on Higuera Street in downtown San Luis Obispo. It's tiny, about 1 inch tall, with bright blue enamel and a thin gold outline, and the pin back is a bit bent from the fall. I had it on my backpack strap while walking past Mission Plaza after grabbing a coffee, and a few people bumped into me, so it could have popped off in that area. It's sentimental—gift from my grandmother—and I’d be grateful to get it back if anyone finds it.