How much should we be able to pump when baby is 4 weeks old?

Vienna
I am only able to pump between 1-2 ounces at a time per side max. My daughter eats very often and always has a mouth full of milk and tons of dirty diapers so I feel like I'm producing enough for her but when I pump it doesn't seem like the case.
I only pump for when we plan to go out. I'm nervous to pump too often and not leave enough for her for our regular day at home. 
I feel like the pump is the right size and speed (evenflo double electric).
Am I normal? I see my friend pump full bottles for her two month old.