It turns out there are scratches/dents/indentations in our back door at the office that is usually locked. It will only open with a swipe card, but the lock is somewhat flimsy on it, and it's very obvious that someone pried it open recently.
Everyone at the office is freaking out now. My office is downstairs and closest to the back door, so if someone did, in fact, pry open the door and run downstairs, my office would have been the easiest to sneak into and grab something.
My heart is breaking just thinking about it. And I don't feel safe anymore.