Exclusively pumping

Im just curious if any Mama's do and how it works for them and their LO.

I feel like my son is constantly on my boob and fussy and it's making me wonder if he's getting enough.

He's 5 almost 6 weeks old now and when I pump I'm lucky to get 2 oz..

I drink water and eat well. I also started drinking mother's milk tea 2 or 3x a day.