My one year old is sick. His symptoms are listless or crabby, he has a runny nose and cough he seems to want to sleep also. I had to wake him up this morning after 15 hours of sleep. He hasn’t slept through the night before. . He won’t eat or drink much. I brought him to the doctor today and he did not have a fever, ear infection or strep throat. He did have an ear infection last week but the doctor said he didn’t have one now. Any idea what it could be?