my 3 mths plus boy also born prematurely at 35.5 mths. he just caught some flu bug from his older bro, resulting in phlegm in lungs. go pd and check if that's the case for your gal. the pd will prescribe nebuliser, zyrtec n illadin for the flu n phlegm. mine didn't poo for a week as well coz his feeding was affected. n he finally poo after the 7th day when we tried to feed him more milk
contact pd
Ivy ling