Pumping/ nicu

Ara

I’m trying to increase my milk supply. I had my baby at 22 weeks and 5 days. I was able to get 15-35 ml from each boob in first 3 weeks. Then We had to transfer to another hospital and at that point my supply started to decrease. I still pump and for the past week have been back to pumping every 3 hours. The problem is I get way more when hand expressing than I do pumping. Any suggestions? Thanks.