FTM breastfeeding

Babygirl is 2 weeks old now I started pumping around 1 week so dad could feed during the night I pump about 3-4oz each time with a bottle she will sleep 4-6 hours but when I nurse her she only sleep 1-2 hours She is usually cranky after she nurses and I end up giving her a bottle to settle her down is she getting enough milk when I nurse her? I don't want to completely bottle feed her but I feel like nursing her is a waste of time cause I end up bottle feeding anyway what should I do to get her eating more from me