Suggest OTC Drug For Cough And Sore Throat

I do not have health insurance or the money to get presciptions at this time.
I am a new kindergarten teacher. In my 2nd week a student coughed in my face and within a couple of days came down with a bad cold. Achy, sore throat, stuffy nose and mild fever (99.7) for a few days. But, I am going into my 5th week of being sick. Now I have a deep cough, coughing up a whitish sometimes yellow phlem, occasionally a non stop cough, Sore throat only at night. No fever or aches. If it weren't for the bad cough, I would feel fine. I have taken Metamusal and Niquil (day/night), cough drops, lots of water and Aleve.

What can I take OTC to get rid of this?