My dd will be 4 weeks on Wed. She is nursing at least every two hrs during the day and three at night. She is still pretty sleepy-I nurse on demand unless its been almost 2 hrs then i wake her to nurse. When can I go completely on demand-and let her sleep when she wants during the day? She did gain back to her birth weight by 2 wks. She wakes on her own at night every 3 hrs.