I just wanted to say that finding the right combo of treatments for a headache is not always easy! It seems like you have a lot of issues playing into your headaches, as do I. Do you get treatments for the sinus problems? Maybe they aren't working? Also, for the stress part and the TMJ part - both those things can cause teeth clenching and a misaligned bite - I had this happen with me and went to my dentist to have a bite splint made, which prevents me from clenching and gridingin my jaws. I think this was the main culprit for my headaches, which were always near my temples and around my ears, where the muscles for your jaw are. I also am on Klonopin (an antianxiety medication) which further relaxes my muscles at night. Before that I tried amitryptyline, cyclobenzaprine, and atenolol with no luck. You might not be able to find one miracle med, but I just wanted to give you an example of the things I do to keep my headaches in check. Just keep working with your neurologist, and don't hesitate to use multiple therapies to get rid of the pain!
"You cannot hope to build a better world without improving the individuals. To that end, each of us must work for our own improvement and, at the same time, share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful." - Marie Curie
"The pessimist sees difficulty in every opportunity. The optimist sees the opportunity in every difficulty." - Winston Churchill