I had a cough since january and wont go away. its a dry cough and every time i do right side of my chest hurts. its been hurting more even if breathin?

Chronic cough: Cough that is persisting could indicate a serious problem. Asthma is a frequent cause of cough and chest tightness. One sided chest pain suggests either muscle pain from coughing or possibly an infection on that side. An evaluation including chest x-ray would be helpful in knowing what the cause is and how to effectively treat it. It's best not to wait this one out.