Dear Antonis,
Welcome to HealthcareMagic forum.
The symptoms your described totally points towards "Upper
respiratory tract Inflammmation" or simply URTI. Upper respiratory tract constitutes, nose, sinus, pharynx and its structures, larynx and part of bronchioles, ear and eustachian tube.
Very often as one part of the respiratory tract gets inflammed either due to infection or
allergy, the inflammation spreads down to the other structures giving rise to variety of symptoms.
From what you describe it looks like your
nasal cavity, sinus, pharynx upto upper bronchioles as well as ears are affected. Though this looks serious and complicated, treatment is simple and easy. Deep steam inhalation, antihistamines (oral as well as nasal sprays),
mucolytic syrups along with antiinflammatory drugs should take care of all your symptoms in a few days.
Most of the above drugs can be obtained over the counter; a few such as mucolytic syrups may need a prescription. If you are running fever, I encourage you to
seek medical help at the earliest. He/she can then prescribe you all these medications along with antibiotics.
The bottom line is your symptoms are not a serious concern. You should be fine soon.
Hope this answer is useful and informative.
Wish you good health.
Regards