To keep your supply up you feed on demand. If baby is under 6 weeks old you really shouldn't be pumping unless you a Absolutely need to. This will cause an over supply and that hurts. 😭
you shouldn't wait until you feel full to pump, that tells your body that it doesn't need to produce more since it's not being extracted. it's all about supply and demand, the more you pump or allow baby to be at the breast the more your body will produce. if your trying to build your supply, I suggest power pumping. I went from making 1-2 oz to making 6-10.