Hello,
Thank you for your query at DoctorSpring.com
I understand your concern.
When you were diagnosed with sinusitis, was a CT- Para Nasal sinuses done? The CT you got done was of brain? Will it be able to share the CT result?
The headache which has persisted could be due to chronic blocked sinusitis, and hence you feel the pressure in the head.
If CT- PNS turns out to be normal, then the second probable cause is tension headache, provided your eyesight is fine.
Kindly share the CT report and I will guide you further,
Regards.