Suggest Treatment For Weakness, Nausea And Extreme Cough

I have been sick for over a week now...It started out with the lost of my voice and temp. and I have been experiencing feeling weak, some nausea,coughing with lots of phlegm, which in color is from yellow to greyish green, body aches, stuffy nose, watery eyes, sometimes I cant hear that well out of my left ear. now I cant seem to get rid of this pesky cough and Im still coughing phlegm, nausea and weakness and my left ear seems to be dull, like turned down. I have tried my usual over the counter drugs which hasn t worked for me at all.