My 4 year old son woke up lethargic and when he came home from preschool i fed him lunch which immediately he threw up.  He started complaining of a headache and seems foggy.  This evening he has started coughing a deep (barking) cough.  His fever is at 102 degrees.  His cheeks are red and he is now taking a nap.  I just gave him childrens tylonel but wondering if I should take him to the ER or wait until morning.
Hi, vomiting followed by fever and cough is suggestive of stomach infection, acute gastroenteritis or viral infection. Tinelol should be continued for fever, give syrup ondansetron for vomiting. If vomiting and fever persist then you should get the child examined by doctor. Also give ORS solution to child to prevent deny Chat Doctor.  If it's a viral infection then it will subside on its own within 24 hours. If vomiting and fever persist then antibiotic needs to be given. Take care.