I hear you. My problem stems from new bone growth and thickened mucosa ( as evident from CT scans) in my sphenoid blocking any path for it to drain causing massive infections. This is reason for headache pain. I have had extensive neurological evaluations that ruled out your suggested diagnosis. As you know sphenoid sinus infections aren’t something to mess with. Sadly the only way to get rid of new bone is surgically.
Thank you for taking time to reply and offer help.