give me more milk!!!

Mummies, today is my 15th day postpartum. I've been doing dl in the day, and pumping every 3 hourly at night. My nanny will use ebm to feed lo at night when needed.. whenever I pump for the past few nights I can only get 60 - 80ml. Am eating fenugreek supplements + been power pumping for 4 days already. What is it I'm doing wrong? Why is my milk supply not increasing?