my new born 2 month baby has cold. how to identify it worse or abnormal. please tell the symptoms

A. Mam how do you identify for yourself that you are having worst cold and it’s very discomforting it’s the same thing you have to see for your child as well that it would be continuously sneezing flowing of nose watery eyes and also maybe because a child is not very accompanied with these kind of issues so they cry cry and cry