All these symptoms suggest that you might be suffering from upper respiratory tract
Recurrence of the symptoms suggest that the causative agent has not been completely eradicated.
, lack of apetite & loss of weight can be attributed to the chronicity of the illness.
There is a connecting tract (known as Eustachian tube) between the nasopharynx
& middle ear through which infection can spread to ear.
Also obstruction to this Eustachian tube can lead to ear pain by un-equalisation of pressure between the nasopharynx & middle ear.
The management consists of:
1. Drinking of warm fluids to reduce throat pain
2. Antihistamines to provide symptomatic relief from cold.
3. Nasal decongestants to relieve obstruction.
4. Analgesics to take care of headache & fever(if any)
Investigation like complete blood count
& X ray of paranasal sinus will be helpful in clinching the diagnosis.
So...it will be better to consult an ENT specialist
for proper physical examination & further management.
Wishing you a speedy recovery.
Thanks & take care.