Feeling pretty down

Hey ladies, my LO is two weeks today. He weighed 8lb 13oz at birth. Last week he weighed 8lbs 5oz and today weighed the same. Everyone is concerned bc he is not gaining weight. I feel like all I do is feed him. The other night I pumped to see how much milk I’m producing. I got almost 3oz. He does fall asleep fast when I feed him and I try my best to keep him awake. Im feeling so defeated. Can anyone share advice?