Sometimes when I'm sick that can happen.....& flu bugs can hang around for longer than we think.....or also for me, stress makes me feel very sick to my stomach & there are times when I feel like that after eating when I'm really in a major stressful situation & that makes me feel like not eating...mostly it's the nausea caused by stress that stops me from eating, not the anorexia itself.......our bodies & minds are complex things that all work together