This may be of no real help at all, your post caught my eye. I have had what I thought were sinus headaches and infections, etc, since 20's, and just found out at 47 that they have been migraines! IF you type in the google bar, sinus/migraine it has articles on how people have gone for years thinking their migraine was a sinus infection. Funny, though the only thing that took mine away was the antibiotic Biaxin. Later found out it has anti inflamatory effects. I even had sinus surgery! Apparently there are all types of migraines which I am just learning about. And have not had one yet to need meds, but am working on that with a neurologist. You think after like 5 cat scans someone might have caught it? Well my PCP finally did. Wow. Good luck ! Last time I did have a cold with globs of yellow mucus I did not have a headache! Very complicated.