Welcome to the Migraine and Headaches Forum! This forum is for questions and support regarding migraine and headache issues such as: abdominal
migraines, headaches caused by allergies, cluster headaches,
headaches, headaches in children, migraine headaches, sinus headaches, tension headaches, visual disturbances.
Since sinusitis has been ruled out, which could have been a very likely cause, the possibility of your symptom being related to deviated nasal septum is very high. DNS is often associated with headaches.
It can be corrected with a very minor surgical procedure known as septoplasty. The surgery is peformed very quickly and recovery usually takes 2-3 weeks. You can discuss this with your ENT specialist as well Thanks