A 15mo dcg has developed a habit of screaming-a high pitched shriek, where it hurts my ear to pick her up. It's usually when tired-yesterday it was first thing in the morning and when I was making lunch, today I did lunch much earlier and she started screaming partway through lunch. What can I do to nip this in the bud? I have a 12mo starting next month and I need this dcg to be more independent by then!