Hi thanks for contacting HCM.... Diagnosis : mostly bronchitis like condition and secondary ear affection leading dizziness .... So cough more than three week should be evaluated through chest x ray. ... Your ear examination also has to be done to look for infection and rule out labyrynthitis like condition that can lead dizziness . .. Take antihistaminic drug like pseudoephedrine or phenylephrine for few days .... Avoid stress and smoking and alcohol .... This advise given because this three can lead dizziness .... Measure your blood pressure , blood sugar level .... Physical examination done .... If still cough more dextromethorphan tablet can given ... Your physical examination will reveal more detail... Take care ....