Maybe you're tired of 60-hour work weeks. Maybe you've been taking on the work (and expectations) of two people since a co-worker quit. Or maybe your company is undergoing a merger, leaving your job security in limbo. Whatever it is, you're just burned out.

If your professional life is leaving you frazzled, you're hardly alone. More than half of workers say they work under a great deal of stress, and 77 percent say they feel burnout on the job, according to a nationwide survey by CareerBuilder.com.

While office stress is common, it can also have dangerous consequences. Chronic workplace stress has been linked to cardiovascular disease, musculoskeletal and psychological disorders, workplace injuries, ulcers and in severe cases, suicide, according to the International Labour Association's Encyclopaedia of Occupational Safety and Health.

Are you experiencing the warning signs of workplace stress? Take this quiz to find out. Select all that apply: