My almost 4 month old ( will be on the 9th) has been irritable, drooling, and running a low grade fever. Which I thought was just him teething. But now he is sneezing and coughing and constantly wanting to be held or rocked all the time. Also his eyes have been watering. Could it be allergies or sinuses or a cold or just him teething. The 'teething' symptoms have been going on for about a week or so. The new symptoms have been going on for about 24-36 hours. Please let me know what you think. So I know whether or not to call his doctor in the morning.