It’s concerning that your 11-day-old daughter has become very fussy and isn’t sleeping longer than an hour, especially since she used to sleep 20 hours. Her waking at the slightest sound and constant need for consoling could indicate discomfort or an underlying issue. The fact that she’s taking medicine for colic adds another layer to consider.
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I would need more details. Recommend to connect over the phone for tele consultation for better understanding and valid prescription from my end.