jobs in nursing whether they are on the floor or in critical care are tough on the mind and the body. the beauty is that once you get your skills and experience you can take nursing in all kinds of different directions. Perhaps your body is telling you to take better care of it. If that means walking away from bedside to teaching or managing or something else, so be it. Dont beat yourself up over some "5 year plan you made in ur mind" and do what makes you happy.