I don't know what to do....Heeeelpppp please?

so i think i'm over the flu but i still have really really bad dry cough i mean really bad and and my ribs and chest hurt for coughing so much and every else on my body hurts like back and legs. All of my symptons are pretty much gone like the vomiting and fever and stuff. But i have a really dry mouth and i keep drinking ginger ale and gatorade but it is not helping. i still get minor headaches and i can eat now but not alot and only toast,applesauce stuff like that. My stomach stills feel a little bit nauseous but not that bad. It's just this freakin dry cough that's getting me. So do have something else besides the flu this is my 6th day of being sick....started on weekend!!!!!