Our baby is 13 weeks old. From yesterday, he is coughing frequently and drooling too much. Also while breathing making too much noise & sound,feels like sufferred with cold and sneezing frequently.His entire body temperature is normal except head is mild hot. He coughs only when awake and even though we hold him upright position. He was diagnosed with GERD when he  8 weeks old but after few days GERD symptoms were disappear.