I have suffered with terrible sinus headaches for years. I had tests years ago to see if they were migraines and tried the drug that was then "the" medication for them. That wasn't the answer. Over time I've learned to cope with them and what over the counter medications help and have made the best of it.
Some of my internet friends talked about chiropractors helping them with a wide variety of aches and pains. Interesting. One mentioned sinus pain. She had my attention! What did I have to lose except a headache? I still hesitated to make an appointment though. For every person who encourages you to try chiropractic, there is one advising against it.