Exclusively pumping

Amanda • Hi, I`m Amanda! 26 years old. TTC #1!
I'm almost three weeks postpartum and average about two ounces per pump session. I know everyone is different but should I be getting more at this point or will the amount increase soon? Right now I produce enough for 3/4 of her feedings so I'm worried about not supplying enough when she needs more. I don't mind contiuing to supplement with formula but wish I didn't have to!