Hi, Welcome to Health care magic forum.
As you describe, you have
common cold since a week, it may be allergic or viral, it may get super infected with the bacteria, and may spread to cause the
sinusitis and the infection of the internal ear.
The cause of the
dry cough may be the swelling of the
uvula,and surrounding tissues.
I advise you to consult an E.N.T. surgeon for diagnosis and treatment.
I usually prescribe to my patient with such symptoms
erythromycin, phenylefrine, citrizine, dextrometharfan, and
diclofenac .
Avoid taking fruits juices, ice cream, ice water etc.
Wishing for a quick and complete recovery. Thank you.