Hello and welcome to HCM,
I have understood that your headache is not getting relieved from simple medication and that you may be having a case of acute sinusitis
You may have a case of sinus headache
also and you thus need to take an antibiotic like amoxycillin-clavulanate
625 mg twice daily along with an antihistamine like levocetrizine once daily. Your doctor will know about these.
If the pain is persisting you may also consider taking injections for faster and better pain relief.
Take steam inhalation and do not have anything cold
When this episode is settled or if the symptoms do not improve then you need to take a CT of the brain and the Sinuses
and get back to me with the reports.
get well soon
Dr Sriram Nathan