My lo is 7 weeks and still doesn't nurse for long periods of time. The longest she ever goes is 15-20 minutes. Most of the time she will nurse for only a few good minutes and she is done. If I give her a bottle of breastmilk she never eats more than 2-3 oz. She seems content after feedings but shouldn't she be eating more and nursing longer? She is somewhere close to 9 lbs now. Any thoughts?