Wanting to exclusively pump

Angie

My daughter is 4 weeks old. I’ve been breast feeding, pumping and giving formula since she’s been born. Lately for convenience sake I’ve been giving formula and only pumping about twice a day. My supply has been pretty low seeing how I don’t pump much. How am I able to get my body to produce more? Should I pump more often? Should I give my baby formula until my supply builds back up?