Anak, please take your baby to the doctor or emergency room right away, lalo na if may halak pa, hindi dapat maghintay with cough, runny nose, at especially if may phlegm/congestion. Better safe than sorry sa babies! Once the doctor checks baby, you'll know exactly what to do. Maraming kaibigan ko nag-worry din sa ganyan, pero once they got the checkup, everything became clear. Praying for your little one!