Hi, My son is 3 months old and preterm. I've been trying to bf him since he was born but he wasn't able to latch on to my nipples as I've small nipples.So, had to express milk and give. But now after 3 months, milk production has decreased and he's mostly on top feed. He gets only twice of 80-90ml of bf otherwise formula.I wanted to ask is there any solution to this problem?? I feed him 70-90ml every 2-3 hourly. Since the day he's on formula(Nan Pro 1), hes been passing green foul smelling stool every 5-6 days. Consistency is toothpaste kind. Change in stool pattern is due to formula I feed or stomach infection?? Regarding milk production, I'm taking Lactonic granules and zandu satavarex daily but I think these aren't helping me anyways. I wanted to express and give bf at least for 6 months as he was premature but I'm helpless and feel as a failure.