Aw mama, ganyan talaga ang adjustment period lalo na pag mixed feeding, ang system ng baby nag-aadapt pa lang sa formula, kaya common ang constipation at hindi regular ang movements sa first few weeks. Honestly, maraming nag-shift din ng formula dahil sa same concern, so it might be worth asking your pedia if Optipro is the right fit for your baby or kung kailangan ng ibang brand na mas gentle sa tummy niya. Sa meantime, siguraduhin na tama ang preparation ng formula (water-to-powder ratio) at maybe try bicycle leg exercises between feeds, pero best talaga na i-monitor closely with your pedia kung kailangan pa rin ng stimulation after a few more days, hindi dapat normal yan na every poop kailangan stimulate. Keep going with your breastmilk too, kahit konti, kasi tumutulong talaga yan sa digestion!