Hello. Sorry to hear you are going through this. It truly sucks.
I am on amitriptyline currently and it helps tremendously. I started it a few months after my original post. I take anywhere from 25 to 100 mg each night before bed. It doesn't make the pain go away entirely, but it definitely reduces the severity of the next day's pain. I'll be curious to learn if it also helps you.
I am actually scheduled to have surgery in a couple weeks to address this problem. The basic idea is that two structures in the sinuses are in contact with each other (and aren't supposed to be) and this somehow produces the pain. Again, I learned this after my original post.
The contact point can be visualized on a CT Scan. So to confirm that this was the source of the problem, my doctor inserted a cotton ball soaked in anesthetic back into the area of the "contact point." My pain immediately subsided. This was only a temporary thing for diagnostic purposes, so the pain eventually came back.
I will post on here after the surgery to let you know the results. If you want more info and web links about this type of surgery, let me know. You can also google "nasal contact points." It is not a mainstream diagnosis from what I can tell, so your average ENT doc may not have heard of it or believe in it. (At least from my personal experience.)