My son has had no voice for a week now. Runny nose, sneezing, cranky. He is 3 yes old. Negative strep. His md said to just give motrin when needed.?

3 YRS OLD URI. Your son has viral uri, upper respiratory infection which can cause all the symptoms you mentioned, it is caused by viruses and gets better by itself.If your child start wheezing, shortness of breath and/or has ear pain or very high fever, then he needs to be evaluated by your pediatrician.