Hi thanks for contacting HCM...
According to your complaint here you have
tonsilitis with
pharyngitis....
Your posterior pharynx examination and respiratory examination has to be done as preliminary work up....
Which antibiotic you are taking ???
Continue taking it for 5 days....
Headache can occur as constitutional symptom in viral infection...
Symptomatic treatment given...
More water and avoid excess spicy food.
Avoid smoking also as it can irritate mucosa.....
Salt water gargles done...
For headache sos
paracetamol can taken..
If blocked nose present by inflammatory swelling of turbinates then decongestent like antihistaminic drug can be taken....
Here if associated sinusitis present then also headache can there.
PNS x ray rule out it....
For it steam inhalation useful with antibiotic...
Take balanced regular meal as
hypoglycemia and skipped meal can aggravate headache....
If cough increasing with fever then chest x ray done to rule out
bronchitis....
Hope your concern solved....
Take care....
Dr.Parth