Are you ill, or been poorly lately, maybe even talking about something to do with health, or... do you smoke, and does she watch Tv?and has been watching the latest ads directed at kids so parents will stop? For whatever reason, it sounds like she has become more insecure about you and is worried about you. If I was you I would ask to speak to the school nurse about it sooner rather than later. Its not that it is a massive problem, but the longer it goes on, the more you and her will be emotionally affected, and it can continue for a while for some people, and ultimately develop into school refusal for some kids. I'm by no means saying that this is going to happen, but I can't gauge the severity, you and the school nurse will be able to, and then the nurse should advise you on what to do, it may mean going to your GP and asking to be referred for advice to CAMHS, who can give advice about what to say and do, and also talk to her 'and assess her. But she is only 5 and it could be a phase and may need no further advice whatsoever. I'm just letting you know that there are services available that can deal with this better than teachers, and it may be beneficial just for peace of mind to check out the school nurse. They arn't based in schools these days but the secretary will give you her number. She'll be fine.