Pumping

Keyaira • Wife, 23 y/o, mother of a 4 yr old, expecting July 2019 😊

My baby girl is 5 days old and she doesnt latch at every feed maybe one a day now but I bottle feed her my breastmilk. She seems to eat like 1.5 ounces atleast every 2 hours and it's so hard pumping like I have to pump every hour it seems to just have milk for her and I'm only pumping 1.5 maybe 2 ounces every hour. What can increase the supply??