my boy is 13 days old so far he sleeps about 4hrs between feedings, he used to feed for 1hr almost straight, now it's for about 40min. he won't empty my breasts so i have to pump milk, i use it for midnight feedings. he's grown more than expected and poops 2 or 3 times per day and pees every time he wakes up. is he getting enough milk? i'm scared my milk production will stop, or he's not getting enough because i pump whats left.