For home remedies, someone in my mum WhatsApp group swears by placing a cool-mist humidifier in the baby's room at night — she said the moist air really helped loosen the phlegm for her lo, but she mentioned don't get the portable mini ones because not powerful enough. Another friend also tried rubbing a little garlic balm on the baby's chest, said it helped with the congestion, though a couple of mums in the group were a bit hesitant to try that on such a young newborn lah. My friend who went to Eu Yan Sang for advice was told that keeping the air moist and soothing the throat area helps with recovery, and she felt it complemented what the doctor prescribed. At 3 weeks old with on-and-off fever though, these home remedies can help alongside proper medical advice, but a newborn so young always better let the doctor assess first ya!
Oh mama, I totally understand your worry — a 3-week-old with phlegm AND fever, that's enough to make any mum's heart race! Please don't wait on this one — bring her to KK now. A fever in a baby this young (under 1 month old) is something the doctors at A&E really need to check properly. It's not the same as an older child having fever — newborns need to be assessed quickly. Trust your motherly instincts. If you feel something is not right, just go. You know your baby best. Sending you both love and prayers — please update us once you're seen, okay? We're all here for you!