Breast Pumping Question?

I’m a FTM with twins, they are currently in the NICU so I’m strictly pumping right now. My milk just starting coming in rapidly and my boobs have really filled in..I just pumped for 25 min and got 62 ML total but my boobs still hurt & feel full..there was still some milk being pumped but the flow was very slow.

Are they empty enough or should continue to pump until absolutely nothing comes out anymore?

Is it normal for them to still feel full & hurt after pumping?