Is it possible to lose your appetite because you hate your job?

normally i really dont mind my job but in the past few weeks this new head of administration has come in and made these major changes. now im spending half of my shift in the phone center and i'm not a phone person at all. im already stressed out but i'm trying to deal. it's making me miserable though. im fantastic at my job and im not allowed to do it. i eat fine at home and on weekends but as soon as i hit work i barely eat all day anymore. is it possible i'm so stressed and unhappy im just not eating at work?