Just consider this! Have you ever caught yourself with clenched toes or calf muscles held taut and tight? Or do you suddenly take a deep breath and let it out, only then realizing you have been breathing very shallowly? Or do you find your hands clammy, when everybody else seems to be doing fine? If you have answered 'Yes' to a couple of those, the chances are you are under a fair amount of stress. The worst thing you can hear when under stress is: "Don't be stressed," and I'm not going to say that.
Forbes.com has a ppt presentation on the 10 most stressful jobs of 2016. Starting from #10: taxi drivers, newspaper reporters, broadcasters, senior corporate executives, public relations executives, event coordinators, police officers, airline pilots, firefighters and finally #1 was military personnel.