My 7 year old son has been coughing & wheezing with a low grade fever for 11 days now.?

See the doctor. This time of year, many respiratory infections are being spread among children in school. Some of them are minor, but some may be serious. If your child has had cough, wheezing, and fever for 11 days, they need to be seen by their doctor to determine the cause of the illness. Please do not delay seeking treatment!
Mycoplasma. Though many reasons for it, infection by mycoplasma can certainly do this. Have your doctor check him. It is important to get treatment.