Feeding too much?

So LO is over 3 weeks. I pump and typically feed her 2 oz of breast milk and sometimes 3 oz if she's really hungry. At our last check up she went from 7 lbs 7 oz to 9 lbs (in a week). I feel like that's a bit much?? Am I feeding my baby too much breast milk? I can see and feel that she's grown a lot since coming home from the hospital. I read somewhere saying babies should gain 3-5 oz a week, if that's the case...maybe I'm feeding her too much...I have no clue. I just feed her whenever she's hungry.