My son is 3 weeks old and has had trouble latching on since the beginning. I originally starting by pumping my breast and when my milk came in I was able to get 3oz from each breast. I started to nurse with a nipple shield and this past week he was in the hospital and I was feeding him every 2 -2 1/2 hrs with a nipple shield. The last few days I needed to go back to pumping and my milk supply has dwindle dramatically, down to 1 0z from each breast, every if I waited 4-6 hours to pump. Both of my breasts are sorer and the pumping has also been painful. They also haven't been that hard and are barely leaking. Can anybody help explain to me what might be going on?