Why do I get shocked so often?

When I am at work I get a “carpet shock” every time I touch anything metal. It happens only to me, and it happens on a daily basis for the past couple of weeks. I don’t “scuff” my feet on the carpet when I walk. It’s very entertaining my co-workers, because when I jump, they get a laugh, but it’s becoming pretty annoying! It only happens at work, never anywhere else. Does anyone have any ideas why this happens to me, and what I can do to stop it?