Suggest Treatment For Cough , Ear Blockage And Cold

Hi I have had a very bad cough for two weeks. Then it turned into a cough/stuffed nose/ blocked ears and now I can not taste anyhting. I am currently on Benzonatate and Prednisone. It is only helping my cough. Is there anything that I can take in conjunction with these two medications to help stop the stuffed up nose and the blocked ears? The ears are starting to hurt. Please help!! Thanks!!