Anxiety is the anticipation of future dangers from unknown or imagined origins that result in normal body reactions (known as physiologic reactions) associated with fear; most common visible behaviors are elimination (urination and / or passage of bowel movements), destruction, and excessive vocalization (barking, crying). (cattime.com)
Their energy is wasted by guilt from unfinished, past happenings and by anxiety from fantasies about catastrophic future dangers, which they strive to ward off by frantic planning and rehearsing. (religion-online.org)