For a cough, try something like guaifenesin, like Robitussin Severe
Congestion Liquagels or Mucinex. Avoid dextramethorphan, like Robitussin DM. It is okay to treat the symptoms of your cough, but if you are getting symptoms that point toward bacterial infection requiring antibiotics, make sure you see your doctor. Examples of symptoms to watch for are fever, coughing up colored phlegm, pain in your chest when you cough, shortness of breath, or any symptoms lasting more than 10 days or so.