Difficulty BF

FTM here, LO is 6 weeks, she is a sleepy one in the daytime, we try to keep her up undress, play, loud house, but she just won’t budge. I eBF and feel like my supply is decreasing since she doesn’t last long enough at the breast. She doesn’t seem hungry after but an hour later she sometimes wants to eat. I pump after her feeds to empty my breast but get very little. Even when she has t fed I get small amounts less then 6oz combined sometimes. Any suggestions??