Nursing and Pumping Tips

Anyone have any tips for building your stock and nursing? My daughter doesn't latch 100% of the time so I have to pump so that I can feed her my breastmilk through a bottle when that happens. The times she does latch on she empties my breast enough to where it seems like I don't pump much milk throughout the rest of the day. Anyone else nurse and pump? I want to breastfeed my daughter but scared it's affecting my supply for feedings when she prefers the bottle. Im 4 weeks post-partum.