has anyone else had this? My DD is 20mths old and has got into a 'habit' of sticking her fingers right down her throat until she retches or is actually sick. Everytime I tell her no, or take her hand out, she just puts it straight back in her mouth. Short of physically holding down her hand at all times, I don't know what to do. She is my 3rd dc and neither of the others did this - just wondered if anyone else had heard of it?