Mama, kecil je lagi baby 24 hari, so switching formula + jamu at the same time memang tricky lah nak identify mana culprit, I'd suggest stop the jamu first since that's absorbed through breastmilk and bisa affect digestion, then observe baby for a few days before deciding if it's the formula. A few of my mum friends yang tukar formula cepat-cepat also kena digestive issues with their babies, so the transition period boleh jadi the main issue, usually kena intro slowly mixed with old formula untuk 1-2 weeks baru full switch. Best thing is to check with your paediatrician atau lactation consultant to make sure baby's not having anything more serious, and they can advise if Lactogen is suitable for your baby or if another brand might be gentler. Good luck mama, semoga baby feel better soon!