Everytime i cough, my throat, chest, and back hurt all at the same time. i already visited the doc, and he say's i'm fine, i don't feel fine though.?

Its possible that: ...Both are true. You can "be" fine, but still feel unwell. Your cough can cause all the symptoms you describe, but it can be a self limited illness that will resolve without (or in spite of) anything your doctor can do. Cough is a violent action your muscles have to do, and some upper respiratory illnesses will lead to days if not weeks of cough. We can lessen the cough with some meds (inhalers).