: Extremely fussy and refusing to sleep 12-week-old My 12-week-old daughter has practically refused to nap during last two days. She is unusually agitated and wants to suck almost all the time. Is something wrong with her?

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11-13 weeks is when a growth spurt may take place. 11-13 weeks is also the time when yet another wonder week may occur.

The slightly-fussier period of a wonder week may last for a few weeks.

The extremely-fussy, constantly sucking no-sleep growth spurt period usually lasts only 2 or 3 days.

If you are really worried or seeing another worrysome symptom, don't hesitate to consult your pediatrician.