So I have read that in order to get a increase you need to empty the breast often. My lactation nurse said every 2 to 3 hours for 15 to 20 mins, never longer. However I think I have very large storage capacities in my breast. I accidentally slept all day (I have mono a premature baby and go to college so I'm exhausted) and when I woke up my breast didnt hurt but I pumped 143 ml. And there's been a few times I've accidentally pumped like 30 minutes and milk is still flowing. So should I go against what they told me and pump 30 mins or longer? I never feel empty but I never feel full... I really dont know what I'm supposed to do??

I'm 28 days post partum and I am still only pumping 380 ml to about 460 or 480.

Exclusively pumping. Baby is in NICU.