Hello and welcome to HCM,
I have understood that your headache is not getting relieved from simple medication.
You may have a case of acute sinusitis
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
get well soon
Dr Sriram Nathan