Gray North Face backpack with orange zipper

I lost my gray North Face backpack yesterday around 3pm. I was walking from the Mall of Abilene toward Buffalo Gap Road and must have left it near the coffee shop area by the parking lot. It's a medium-sized backpack, weathered gray fabric with an orange zipper, and a small blue bicycle sticker on the front pocket. Inside there's my laptop charger, a spiral notebook from class, and a ragged photo album with pictures of my grandmother, sentimental stuff that can't be replaced. One identifying feature is a bright green monkey keychain clipped to the zipper pull, plus a dent on the bottom-right corner from a tumble last week. I really need it back; it means a lot to me.