I'm not a doctor, but, the only thing I could suggest is to make sure your not congested i.e. no back drip to feed the cough and #2 you're kind of stuck with over the counter cough meds unless you want a prescription med from the md, which will probably make you drowsy.
if the fever is gone, think about what phil's saying, nasal saline can clear any post-nasal drip
you could cough for many weeks, dark honey (e.g. buckwheat) is proven to lessen cough as well as guaifenesin