My 6 week old has recently started to get frustrated and seems to have a problem when he latches on. I know that my milk production is ok since there seems to be an abundance of milk being released from his mouth because he is not completely latching on. He is also only feeding 5 to 10 minutes on one breast at each feeding. He is making plenty of poops/pees. I think he is getting enough but I don't understand his frustration. Is he having a bad day? If he is this is the first I've seen like this. I do supplement with bottles of breastmilk once a week. Is it possible that he has nipple confusion?