Thanks for writing to us.
The symptoms described by you points towards the probabality of Chronic sinusitis
even though other triggering factors such as repeated exposures to "house dust mite"/microbes/pollens /vasomotor factors such as sudden dip in temperature to more than 10 Degree celsius do produce the above mentioned symptoms.
The swollen lymph nodes
definitely point towards infection if they are firm to hard in consistancy.If they are stony hard to palpate then they indicate malignancy.
Investigations;-Pls do routine blood count/blood chemistry/urinalysis/PNS X Ray/CXR-PA view/Sputum for routine/micro/Culture and Sensitivity /AFB/Exfoliative Cytology.
With all the reports do consult the specialist -ENT Surgeon for definitive treatment.
For the time being continue the empirical therapy described by your doctor including Steam Inhalation/Expectorants/antibiotics etc.
Prevention;By keeping away from dust/infected persons/pollens/wearing a mask while driving/abstain from smoking
Wishing you a Speedy Recovery,
Dr Lt Cdr ASN Bhushan.,