Mama, hindi ito normal, please take her to her pediatrician today or go to the nearest clinic, lalo na with that smell you're describing. Four days without pooping plus unusual odor is something the doctor needs to check right away, hindi dapat paghintayan pa. One of my mum friends had something similar with her baby and nag-alarm din siya, but the doctor checked immediately and nasagot agad. Don't worry, pero kailangan ng medical check talaga dito, okay? Update me after, thinking of you both.