Uy momshie, I understand your worry lalo na't nasa NICU ang baby mo! Please check with the lactation consultant or nurse sa hospital agad, hindi kami dapat mag-guess sa ganito, especially since your baby has special needs right now at kailangan niya ng tama talaga.
A few of us moms have asked the same thing before, and honestly ang sagot always depends sa maraming factors, kaya talaga importante marinig from the medical team. They'll know exactly what's normal for your situation at baby's needs. You're doing great pumping for your little one, ha, that's so loving of you.