Ay, kahit na kinonsulta mo na siya at binigyan ng meds, nakakaprustrate talaga pag ganun pa rin. Siguro worth asking the pedia ulit kung kailangan pa ng ibang approach or kung may milk sensitivity pa despite the LF formula, kasi five days pa lang yan at baka need ng time para mag-adjust, pero kung pagiging concerned mo ay mataas, better safe than sorry with poop changes, matanggal mo lang agad ang worry once matipag-usapan ninyo in detail. Teething at 4 months ay possible pero usually ang main cause ng frequent loose stools ay either ang formula mismo, kung kumain kang something na nag-pass sa breastmilk, or an infection, kaya I'd really push for a follow-up pedia visit para mas specific na assessment.