Hi thanks for contacting HCM... Noted you are complaining chest pain since one month with dull aching like and shifting... Do you smoking???? Any positive cardiac history ??? First as you also have cough your respi examination done with stethoscope for rhonchi ....If it is present then bronchi constriction by allergen can cause pain. So it might be allergic condition like asthma. Pulmonary function test done for it... It will also rule out bronchitis along with chest x ray.... If you are chronic smoker then fibrotic lung disease ruled out by chest x ray... If no respi causes present then no need for worry... It could be simple muscular pain... If chest pain increasing then cardiac causes has to be searched by ECG .. Take care....